|1983 Beirut barracks bombings|
|Part of the Lebanese Civil War|
A smoke cloud rises from the rubble of the bombed barracks at Beirut International Airport (BIA).
|Date||October 23, 1983
|Suicide attack, Truck bombs, Mass murder, Terrorism|
|Deaths||305 victims (220 U.S. Marines, 18 sailors, and three soldiers; 58 French paratroopers; six civilians)
2 suicide bombers
The 1983 Beirut barracks bombings were terrorist attacks that occurred on October 23, 1983, in Beirut, Lebanon, during the Lebanese Civil War when two truck bombs struck separate buildings housing United States and French military forces—members of the Multinational Force in Lebanon (MNF)—killing 241 U.S. and 58 French servicemen, six civilians, and the two suicide bombers. An obscure group calling itself 'Islamic Jihad' claimed responsibility for the bombings and that the bombings were aimed to get the MNF out of Lebanon.
The chain of command likely ran from the government of Iran; to Iran's Ambassador to Syria, Ali Akbar Mohtashamipur, located in Damascus; to Iranian Revolutionary Guard Corps (IRGC) commander Hossein Dehghan in Beirut as the Iranians drew on assets in Lebanon. Hezbollah, Iran, and Syria have continued to deny any involvement in any of the bombings, even though the Iranian government erected a monument in Tehran to commemorate the 1983 bombings and its "martyrs" in 2004.
Two suicide bombers detonated each of the truck bombs. In the attack on the building serving as a barracks for the 1st Battalion 8th Marines (Battalion Landing Team - BLT 1/8), the death toll were 220 Marines, 18 sailors, and three soldiers, making this incident the deadliest single-day death toll for the United States Marine Corps since World War II's Battle of Iwo Jima, the deadliest single-day death toll for the United States Armed Forces since the first day of the Vietnam War's Tet Offensive, the deadliest single terrorist attack on American citizens in general prior to the September 11 attacks, and the deadliest single terrorist attack on American citizens overseas. Another 128 Americans were wounded in the blast. Thirteen later died of their injuries, and they are numbered among the total number who died. An elderly Lebanese man, a custodian/vendor who was known to work and sleep in his concession stand next to the building, was also killed in the first blast. The explosives used were later estimated to be equivalent to as much as 9,525 kg (21,000 pounds) of TNT.
In the attack on the French barracks, the nine-story 'Drakkar' building, 55 paratroopers from the 1st Parachute Chasseur Regiment and three paratroopers of the 9th Parachute Chasseur Regiment were killed and 15 injured by a second truck bomb. This attack occurred just minutes after the attack on the American Marines. It was France's single worst military loss since the end of the Algerian War. The wife and four children of a Lebanese janitor at the French building were also killed, and more than twenty other Lebanese civilians were injured.
These attacks eventually led to the withdrawal of the international peacekeeping force from Lebanon, where they had been stationed since the withdrawal of the Palestine Liberation Organization (PLO) following the Israeli invasion of Lebanon in 1982.
On June 6, 1982, the Israel Defense Forces (IDF) initiated Operation "Peace for Galilee" and invaded Lebanon ostensibly to create a 40 km buffer zone between the PLO and Syrian forces in Lebanon and Israel. The Israeli invasion was tacitly approved by the U.S., and the U.S. provided overt military support to Israel in the form of arms and matériel. However, what the U.S. agreed to support and what Israel did were altogether two separate matters. Nevertheless, the U.S.' 'apparent support' for Israel's invasion of Lebanon taken in conjunction with U.S. support for Lebanese President Bachir Gemayel and the Lebanese Armed Forces (LAF) alienated many. Bachir Gemayel was the legally elected president, but he was a partisan Maronite Christian and covert associate of Israel. These factors served to disaffect the Lebanese Muslim and Druze communities. This animosity was made worse by the Phalangist, a right-wing, largely Maronite-Lebanese militia force closely associated with President Gemayel. The Phalangist militia was responsible for multiple, bloody attacks against the Muslim and Druze communities in Lebanon and for the 1982 atrocities committed in the PLO refugee camps, Sabra and Shatila by Lebanese Forces (LF), while the IDF provided security and looked on. The Phalangist militia's attacks on Sabra and Shatila were purportedly a response to the September 14, 1982, assassination of President-elect Bachir Gemayel. Amine Gemayel, Bachir's brother, succeeded Bachir as the elected president of Lebanon, and Amine continued to represent and advance Maronite interests.
All of this, according to British foreign correspondent Robert Fisk, served to generate ill will against the MNF among Lebanese Muslims and especially among the Shiites living in the slums of West Beirut. Lebanese Muslims were manipulated into believing the MNF, and the Americans in particular, were unfairly siding with the Maronite Christians in their attempt to dominate Lebanon. As a result, this led to artillery, mortar, and small arms fires being directed at MNF peacekeepers by Muslim factions. Operating under the peacetime rules of engagement, MNF peacekeepers—primarily U.S. and French forces—used minimum use of force as possible in order to avoid compromising their neutral status. Until October 23, 1983, there were ten ROE guidelines issued for each U.S. Marine member of the MNF:
The perimeter guards at the U.S. Marine headquarters on the morning of October 23, 1983, were in full compliance with rules 1-3 and were unable to shoot fast enough to disable or stop the bomber (see The bombings: Sunday, October 23, 1983 below).
In 1982, the Islamic Republic of Iran established a base in the Syrian-controlled Bekaa Valley in Lebanon. That base is still operational today. From that base, Iran's Islamic Revolutionary Guard Corps (IRGC) "founded, financed, trained and equipped Hezbollah to operate as a proxy army" for Iran. Some analysts believe the newly formed Islamic Republic of Iran was heavily involved in the bomb attacks and that a major factor leading it to orchestrate the attacks on the barracks was America's support for Iraq in the Iran–Iraq War and its extending of $2.5 billion in trade credit to Iraq while halting the shipments of arms to Iran. A few weeks before the bombing, Iran warned that providing armaments to Iran's enemies would provoke retaliatory punishment.[Notes 1] On September 26, 1983, "the National Security Agency (NSA) intercepted an Iranian diplomatic communications message from the Iranian intelligence agency, the Ministry of Information and Security (MOIS)," to its ambassador, Ali Akbar Mohtashemi, in Damascus. The message directed the ambassador to "take spectacular action against the American Marines." The intercepted message, dated September 26, would not be passed to the Marines until October 26: three days after the bombing.
Much of what is now public knowledge of Iranian involvement, e.g., PETN purportedly supplied by Iran, the suicide bomber's name and nationality, etc., in the bombings was not revealed to the public until the 2003 trial, Peterson, et al v. Islamic Republic, et al. Testimony by Admiral James "Ace" Lyon's, U.S.N. (Ret), and FBI forensic explosive investigator Danny A. Defenbaugh, plus a deposition by a Hezbollah operative named Mahmoud (a pseudonym) were particularly revealing.
On July 14, 1983, a Lebanese Armed Forces patrol was ambushed by Druze militia elements, and from July 15–17, Lebanese troops engaged the Shia Amal militia in Beirut over a dispute involving the eviction of Shiite squatters from a schoolhouse. At the same time, fighting in the Shuf between the LAF and Druze militia escalated sharply. On July 22, Beirut International Airport (BIA), the headquarters of the U.S. 24th Marine Amphibious Unit (24th MAU), was shelled with Druze mortar and artillery fire, wounding three U.S. Marines and causing the temporary closing of the airport.
On July 23, Walid Jamblatt, leader of the predominantly Druze Progressive Socialist Party (PSP), announced the formation of a Syrian-backed "National Salvation Front" opposed to the May 17 Agreement. In anticipation of an IDF withdrawal from the Alayh and Shuf districts, fighting between the Druze and LF and between the Druze and LAF, intensified during the month of August. Druze artillery closed the BIA between 10 and 16 August, and the Druze made explicit their opposition to LAF deployment in the Shuf. The LAF also clashed with the Amal militia in Beirut's western and southern suburbs.
As the security situation deteriorated, U.S. positions at BIA were subjected to increased fire. On August 10 and 11, an estimated thirty-five rounds of mortar and rocket fire landed on U.S. positions, wounding one Marine. On August 28, in response to constant mortar and rocket fire upon U.S. positions, U.S. peacekeepers returned fire for the first time. On the following day, U.S. artillery silenced a Druze battery after two Marines were killed in a mortar attack. On August 31, the LAF swept through the Shia neighborhood of West Beirut, establishing temporary control over the area.
On September 4, the IDF withdrew from the Alayh and Shuf Districts, falling back to the Awwali River. The LAF was not prepared to fill the void, moving instead to occupy the key junction at Khaldah, south of BIA. That same day, BIA was again shelled, killing two Marines and wounding two others. No retaliation was given due to the ROE. As the LAF moved slowly eastward into the foothills of the Shuf, accounts of massacres, conducted by Christians and Druze alike, began to be reported. On September 5, a Druze force, reportedly reinforced by PLO elements, routed the Christian LF militia at Bhamdun and all but eliminated the LF as a military factor in the Alayh District. This defeat obliged the LAF to occupy Suq-AlGharb to avoid conceding all of the high ground overlooking BIA to the Druze. U.S. positions were again subjected to constant indirect fire attacks; consequently, counterbattery fire based on target acquisition radar data was employed. F-14 tactical airborne reconnaissance (TARPS) missions were conducted for the first time on September 7. On September 8, naval gunfire from offshore destroyers was employed for the first time in defense of the U.S. Marines.
On September 25, a ceasefire was instituted that same day and Beirut International Airport reopened five days later. On October 1, Walid Jumblatt announced a separate governmental administration for the Shuf and called for the mass defection of all Druze elements from the LAF. Nevertheless, on 14 October the leaders of Lebanon's key factions agreed to conduct reconciliation talks in Geneva, Switzerland. Although the ceasefire officially held into mid-October, factional clashes intensified and sniper attacks on MNF contingents became commonplace. On October 19, four Marines were wounded when a U.S. convoy was attacked by a remotely detonated car bomb parked along the convoy route.
At around 06:22, a 19-ton yellow Mercedes-Benz stake-bed truck drove to the Beirut International Airport. The 1st Battalion 8th Marines (BLT), commanded by Lieutenant Colonel Larry Gerlach, was a subordinate element of the 24th MAU. The truck was not the water truck they had been expecting. Instead, it was a hijacked truck carrying explosives. The driver turned his truck onto an access road leading to the compound. He drove into and circled the parking lot, and then he accelerated to crash through a 5-foot-high barrier of concertina wire separating the parking lot from the building. The wire popped "like somebody walking on twigs." The truck then passed between two sentry posts and through an open vehicle gate in the perimeter chain-link fence, crashed through a guard shack in front of the building and smashed into the lobby of the building serving as the barracks for the 1st Battalion 8th Marines (BLT). The sentries at the gate were operating under rules of engagement which made it very difficult to respond quickly to the truck. Sentries were ordered to keep their weapons at condition four (no magazine inserted and no rounds in the chamber). Only one sentry, LCpl Eddie DiFranco, was able to load and chamber a round. However, by that time the truck was already crashing into the building's entryway.
The suicide bomber, an Iranian national named Ismail Ascari, detonated his explosives, which were later estimated to be equivalent to approximately 9,525 kilograms (21,000 pounds) of TNT. The force of the explosion collapsed the four-story building into rubble, crushing to death 241 American servicemen. According to Eric Hammel in his history of the U.S. Marine landing force,
"The force of the explosion initially lifted the entire four-story structure, shearing the bases of the concrete support columns, each measuring fifteen feet in circumference and reinforced by numerous one-and-three-quarter-inch steel rods. The airborne building then fell in upon itself. A massive shock wave and ball of flaming gas was hurled in all directions."
The explosive mechanism was a gas-enhanced device consisting of compressed butane in canisters employed with pentaerythritol tetranitrate (PETN) to create a fuel-air explosive. The bomb was carried on a layer of concrete covered with a slab of marble to direct the blast upward. Despite the lack of sophistication and wide availability of its component parts, a gas-enhanced device can be a lethal weapon. These devices were similar to fuel-air or thermobaric weapons, explaining the large blast and damage. An after-action forensic investigation by the Federal Bureau of Investigation (FBI) determined that the bomb was so powerful that it probably would have brought down the building even if the sentries had managed to stop the truck between the gate and the building.
Less than ten minutes later, a similar attack occurred against the barracks of the French 3rd Company of the 1st Parachute Chasseur Regiment, 6 km away in the Ramlet al Baida area of West Beirut. As the suicide bomber drove his pickup truck toward the "Drakkar" building, French paratroopers began shooting at the truck and its driver. It is believed that the driver was killed and the truck was immobilized and rolled to stop about fifteen yards from the building. A few moments passed before the truck exploded, bringing down the nine-story building and killing 58 French paratroopers. It is believed that this bomb was detonated by remote control and that, though similarly constructed, it was smaller than and slightly less than half as powerful as the one used against the Marines at the Beirut International Airport. Many of the paratroopers had gathered on their balconies moments earlier to see what was happening at the airport. It was France's worst military loss since the end of the Algerian War in 1962.
Organized rescue efforts began immediately – within three minutes of the bombing – and continued for days. Unit maintenance personnel were not billeted in the BLT building, and they rounded up pry bars, torches, jacks and other equipment from unit vehicles and maintenance shops and began rescue operations. Meanwhile, combat engineers and truck drivers began using their organic assets, i.e., trucks and engineering equipment, to help with the rescue operations. 24th MAU medical personnel, Navy dentists LT Gil Bigelow and LT Jim Ware, established two aid stations to triage and treat casualties. Medevac helicopters, CH-46s from Marine Medium Helicopter Squadron (HMM-162), were airborne by 6:45 AM. U.S. Navy medical personnel from nearby vessels of the U.S. Sixth Fleet went ashore to assist with treatment and medical evacuation of the injured, as did sailors and shipboard Marines who volunteered to assist with the rescue effort. Lebanese, Italian, British, and even French troops, who had suffered their own loss, provided assistance.
Many Lebanese civilians voluntarily joined the rescue effort. Especially important was a Lebanese construction contractor, Rafiq Hariri of the firm Oger-Liban, who provided heavy construction equipment, e.g., a 40-ton P & H crane, etc., from nearby BIA worksites. Hariri's construction equipment proved vitally necessary in lifting and removing heavy slabs of concrete debris at the barracks site just as it had been necessary in assisting with clearing debris after the April U.S. Embassy attack.
While the rescuers were at times hindered by hostile sniper and artillery fire, several Marine survivors were pulled from the rubble at the BLT 1/8 bomb site and airlifted by helicopter to the USS Iwo Jima, located offshore. U.S. Navy, U.S. Air Force and Royal Air Force medevac planes transported the seriously wounded to the hospital at RAF Akrotiri in Cyprus and to U.S. and German hospitals in West Germany. A few survivors, including LTC Gerlach, were sent to the Italian MNF dispensary and to Lebanese hospitals in Beirut. Israel's offers to medevac the wounded to hospitals in Israel were rejected as politically unacceptable even though Israeli hospitals were known to provide excellent care and were considerably closer than hospitals in Germany.
At about noon Sunday, October 23, the last survivor was pulled from the rubble; he was LTJG Danny G. Wheeler, Lutheran chaplain for BLT 1/8. Other men survived beyond Sunday, but they succumbed to their injuries before they could be extracted from the rubble. By Wednesday, the majority of the bodies and body parts had been recovered from the stricken barracks, and the recovery effort ended on Friday. After five days, the FBI came in to investigate, and the Marines returned to normal duties.
"The explosion at the French barracks blew the whole building off its foundations and threw it about 6 meters (20 feet) westward, while breaking the windows of almost every apartment house in the neighborhood...Grim-faced French paratroopers and Lebanese civil defense workers aided by bulldozers also worked under spotlights through the night at the French barracks, trying to pull apart the eight stories of 90 centimeter (3 foot) thick cement that had fallen on top of one another and to reach the men they could still hear screaming for help. They regularly pumped oxygen into the mountain of rubble to keep those who were still trapped below alive."
U.S. President Ronald Reagan called the attack a "despicable act" and pledged to keep a military force in Lebanon. U.S. Defense Secretary Caspar Weinberger, who had privately advised the administration against stationing U.S. Marines in Lebanon, said there would be no change in the U.S.'s Lebanon policy. French President François Mitterrand and other French dignitaries visited both the French and American bomb sites to offer their personal condolences on Monday, October 24, 1983. It was not an official visit, and President Mitterrand only stayed for a few hours, but he did declare "We will stay." During his visit, President Mitterrand visited each of the scores of American caskets and made the sign of the cross as his mark of respectful observance for each of the fallen peacekeepers. U.S. Vice President George H. W. Bush arrived and made a tour of the destroyed BLT barracks on Wednesday, October 26, 1983. Vice President Bush toured the site and said the U.S. "would not be cowed by terrorists." Vice President Bush also visited with wounded U.S. personnel aboard the U.S.S. Iwo Jima (LPH-2), and he took time to meet with the commanders of the other MNF units (French, Italian and British) deployed in Beirut.
In retaliation for the attacks, France launched an airstrike in the Beqaa Valley against alleged Islamic Revolutionary Guard Corps (IRGC) positions. President Reagan assembled his national security team and planned to target the Sheik Abdullah barracks in Baalbek, Lebanon, which housed Iran's Islamic Revolutionary Guard Corps (IRGC) believed to be training Hezbollah militants. A joint American–French air assault on the camp where the bombing was planned was also approved by Reagan and Mitterrand. U.S. Defense Secretary Weinberger lobbied successfully against the mission, because at the time it was not certain that Iran was behind the attack.
Some of the U.S. Marines in Beirut were moved to transport vessels offshore where they could not be targeted; yet, they would be ready and available to serve as a ready reaction force in Beirut if needed. For protection against snipers and artillery attacks, the Marines remaining at the airport built and moved into bunkers in the ground employing 'appropriated' Soviet-bloc CONEXes.
Col Geraghty requested and received reinforcements to replace his unit losses. BLT 2/6, the Division Marine Air Alert Battalion stationed at Camp Lejeune, North Carolina, and commanded by LtCol Edwin C. Kelley, was dispatched and flown into Beirut by four C-141s in less than 36 hours after the bombing. LtCol Kelley officially replaced the seriously injured BLT 1/8 commander, LtCol Gerlach. LtCol Kelley quietly redesignated his unit, BLT 2/6, as BLT 1/8 to help bolster the morale of the BLT 1/8 survivors. On November 18, 1983, the 22d MAU rotated into Beirut and relieved in place the 24th MAU. The 24th MAU returned to Camp Lejeune, NC, for training and refitting.
Eventually, it became evident that the U.S. would launch no serious and immediate retaliatory attack for the Beirut Marine barracks bombing beyond naval barrages and air strikes used to interdict continuous harassing fire from Druze and Syrian missile and artillery sites. A true retaliatory strike failed to materialize because there was a rift in White House counsel (largely between George P. Shultz of the Department of State and Weinberger of the Department of Defense) and because the extant evidence pointing at Iranian involvement was circumstantial at that time: the Islamic Jihad, which took credit for the attack, was a front for Hezbollah which was acting as a proxy for Iran; thus, affording Iran plausible deniability. Secretary of State Schultz was an advocate for retaliaton, but Secretary of Defense Caspar Weinberger was against retaliation. Secretary of Defense Weinberger, in a September 2001 FRONTLINE interview, reaffirmed that rift in White House counsel when he claimed that the U.S. still lacks "'actual knowledge of who did the bombing' of the Marine barracks."
The USS New Jersey had arrived and taken up station off Beirut on September 25, 1983. Special Representative in the Middle East Robert McFarlane's team had requested the New Jersey after the August 29th Druze mortar attack that killed two Marines. After the October 23rd bombing, on November 28, the U.S. government announced that the New Jersey would remain stationed off Beirut although her crew would be rotated. It wasn't until December 14 that the New Jersey finally joined the fray and fired 11 projectiles from her 16-inch guns at hostile targets near Beirut. "This was the first time 16-inch shells were fired for effect anywhere in the world since the New Jersey ended her time on the gunline in Vietnam in 1969." Also in December 1983, U.S. aircraft from the USS John F. Kennedy and USS Independence battle groups attacked Syrian targets in Lebanon, but this was ostensibly in response to Syrian missile attacks on American warplanes.
In the meantime, the attack boosted the prestige and growth of the Shiite organization Hezbollah. Hezbollah officially denied any involvement in the attacks, but was seen by Lebanese as involved nonetheless as it praised the "two martyr mujahideen" who "set out to inflict upon the U.S. Administration an utter defeat, not experienced since Vietnam." Hezbollah was now seen by many as "the spearhead of the sacred Muslim struggle against foreign occupation".
The 1983 report of the U.S. Department of Defense Commission's on the attack recommended that the National Security Council investigate and consider alternative ways to reach "American objectives in Lebanon" because, "as progress to diplomatic solutions slows," the security of the USMNF base continues to "deteriorate." The commission also recommended a review for the development of a broader range of "appropriate military, political, and diplomatic responses to terrorism." Military preparedness needed improvement in the development of "doctrine, planning, organization, force structure, education, and training" to better combat terrorism, while the USMNF was "not prepared" to deal with the terrorist threat at the time due to "lack of training, staff, organization, and support" specifically for defending against "terror threats."
Amal Movement leader Nabih Berri, who had previously supported U.S. mediation efforts, asked the U.S. and France to leave Lebanon and accused the two countries of seeking to commit 'massacres' against the Lebanese and of creating a "climate of racism" against Shias. Islamic Jihad phoned in new threats against the MNF pledging that "the earth would tremble" unless the MNF withdrew by New Year's Day 1984.
On February 7, 1984, President Reagan ordered the Marines to begin withdrawing from Lebanon largely because of waning congressional support for the mission after the attacks on the barracks. The withdrawal of the 22d MAU from the BIA was completed 12:37 PM on February 26, 1984. "Fighting between the Lebanese Army and Druze militia in the nearby Shouf mountains provided a noisy backdrop to the Marine evacuation. One officer commented: 'This ceasefire is getting louder.'"
On February 8, 1984, the U.S.S. New Jersey fired almost 300 shells at Druze and Syrian positions in the Beqaa Valley east of Beirut. This was the heaviest shore bombardment since the Korean War. "In a nine-hour period, the U.S.S. New Jersey fired 288 16-inch rounds, each one weighing as much as a Volkswagen Beetle. In those nine-hours, the ship consumed 40 percent of the 16-inch ammunition available in the entire European theater...[and] in one burst of wretched excess," the New Jersey seemed to be unleashing eighteen months of repressed fury.
"Many Lebanese still recall the 'flying Volkswagens,' the name given to the huge shells that struck the Shouf." In addition to destroying Syrian and Druze artillery and missile sites, approximately 30 of these behemoth projectiles rained down on a Syrian command post, killing the senior commanding Syrian general in Lebanon along with several of his senior officers. Some of New Jersey's shells missed their intended targets and killed non-combatants, mostly Shiites and Druze.
Following the U.S.' lead, the rest of the multinational force, the British, French and Italians, was withdrawn by the end of February 1984. The ship borne 22d MAU contingent remained stationed offshore near Beirut while a detached 100 man ready reaction force remained stationed ashore near the U.S./U.K. Embassy. The 22d MAU was relieved in place by the 24th MAU on April 10, 1984. On April 21, the ready reaction force in Beirut was deactivated and its men were reassigned to their respective ships. In late July, 1984, the last Marines from the 24th MAU, the U.S./U.K. Embassy guard detail, was withdrawn from Beirut.
At the time of the bombing, an obscure group called the "Islamic Jihad" claimed responsibility for the attack. There were many in the U.S. government, such as Vice President Bush, Secretary of State George Shultz, and National Security Adviser Robert McFarlane (who was formerly Reagan's Mideast envoy), who believed Iran and/or Syria were/was responsible for the bombings. After some years of investigation, the U.S. government now believes that elements of what would eventually become Hezbollah, backed by Iran and Syria, were responsible for these bombings as well as the bombing of the U.S. Embassy in Beirut earlier in April. It is believed that Hezbollah used the name "Islamic Jihad" to remain anonymous. Hezbollah eventually announced its existence in 1985. To date, Hezbollah, Iran and Syria have continued to deny any involvement in any of the bombings; even though, in 2004, the Iranian government erected a monument in Tehran to commemorate the 1983 bombings and its "martyrs".
Imad Mughniyeh and Mustafa Badr Al Din took charge of the Syrian–Iranian backed operation. Mughniyeh had been a highly trained security man with the PLO's Force 17 . . . Their mission was to gather information and details about the American embassy and draw up a plan that would guarantee the maximum impact and leave no trace of the perpetrator. Meetings were held at the Iranian embassy in Damascus. They were usually chaired by the ambassador, Hojatoleslam Ali-Akbar Mohtashemi, who played an instrumental role in founding Hezbollah. In consultation with several senior Syrian intelligence officers, the final plan was set in motion. The vehicle and explosives were prepared in the Bekaa Valley which was under Syrian control.
Two years after the bombing, a U.S. grand jury secretly indicted Imad Mughniyah for his terrorist activities. Mughniyah was never captured, but he was killed by a car bomb in Syria on February 12, 2008.
Commentators argue that the lack of a response by the Americans emboldened terrorist organizations to conduct further attacks against U.S. targets. Along with the U.S. embassy bombing, the barracks bombing prompted the Inman Report, a review of the security of U.S. facilities overseas for the U.S. State Department.
On March 8, 1985, a truck bomb blew up in Beirut killing more than 80 people and injuring more than two hundred. The bomb detonated near the apartment block of Sheikh Mohammad Hussein Fadlallah, a Shia cleric thought by many to be the spiritual leader of Hezbollah. Although the U.S. did not engage in any direct military retaliation to the attack on the Beirut barracks, the 1985 bombing was widely believed by Fadlallah and his supporters to be the work of the United States; Sheikh Fadlallah stating that "'They sent me a letter and I got the message,' and an enormous sign on the remains of one bombed building read: 'Made in the U.S.A.'" Robert Fisk also claims that CIA operatives planted the bomb and that evidence of this is found in an article in The Washington Post newspaper. Journalist Robin Wright quotes articles in The Washington Post and The New York Times as saying that according to the CIA the "Lebanese intelligence personnel and other foreigners had been undergoing CIA training" but that "this was not our [CIA] operation and it was nothing we planned or knew about." "Alarmed U.S. officials subsequently canceled the covert training operation" in Lebanon, according to Wright.
Shortly after the barracks bombing, President Ronald Reagan appointed a military fact-finding committee headed by retired Admiral Robert L. J. Long to investigate the bombing. The commission's report found senior military officials responsible for security lapses and blamed the military chain of command for the disaster. It suggested that there might have been many fewer deaths if the barracks guards had carried loaded weapons and a barrier more substantial than the barbed wire the bomber drove over easily. The commission also noted that the "prevalent view" among U.S. commanders was that there was a direct link between the navy shelling of the Muslims at Suq-al-Garb and the truck bomb attack.
Following the bombing and the realization that insurgents could deliver weapons of enormous yield with an ordinary truck or van, the presence of protective barriers (bollards) became common around critical government facilities in the United States and elsewhere, particularly Western civic targets situated overseas.
An article in Foreign Policy titled "Lesson Unlearned" argues that the U.S. military intervention in the Lebanese Civil War has been downplayed or ignored in popular history – thus unlearned – and that lessons from Lebanon are "unlearned" as the U.S. militarily intervenes elsewhere in the world.
On October 3 and December 28, 2001, the families of the 241 U.S. servicemen who were killed as well as several injured survivors filed civil suits against Islamic Republic of Iran and the Ministry of Information and Security (MOIS) in the U.S. District Court for the District of Columbia.  In their separate complaints, the families and survivors sought a judgment that Iran was responsible for the attack and relief in the form of damages (compensatory and punitive) for wrongful death and common-law claims for battery, assault, and intentional infliction of emotional distress resulting from an act of state-sponsored terrorism.
Iran (the defendant) was served with the two complaints (one from Deborah D. Peterson, Personal Representative of the Estate of James C. Knipple, et al., the other from Joseph and Marie Boulos, Personal Representatives of the Estate of Jeffrey Joseph Boulos) on May 6 and July 17, 2002. Iran denied responsibility for the attack but did not file any response to the claims of the families. On December 18, 2002, Judge Royce C. Lamberth entered defaults against defendants in both cases.
On May 30, 2003, Lamberth found Iran legally responsible for providing Hezbollah with financial and logistical support that helped them carry out the attack. Lamberth concluded that the court had personal jurisdiction over the defendants under the Foreign Sovereign Immunities Act, that Hezbollah was formed under the auspices of the Iranian government and was completely reliant on Iran in 1983, and that Hezbollah carried out the attack in conjunction with MOIS agents.
On September 7, 2007, Lamberth awarded $2,656,944,877 to the plaintiffs. The judgment was divided up among the victims; the largest award was $12 million to Larry Gerlach, who became a quadriplegic as a result of a broken neck he suffered in the attack.
The attorney for the families of the victims uncovered some new information, including a U.S. National Security Agency intercept of a message sent from Iranian intelligence headquarters in Tehran to Hojjat ol-eslam Ali-Akbar Mohtashemi, the Iranian ambassador in Damascus. As it was paraphrased by presiding U.S. District Court Judge Royce C. Lamberth, "The message directed the Iranian ambassador to contact Hussein Musawi, the leader of the terrorist group Islamic Amal, and to instruct him ... 'to take a spectacular action against the United States Marines.'" Musawi's Islamic Amal was a breakaway faction of the Amal Movement and an autonomous part of embryonic Hezbollah.
In July 2012, federal Judge Royce Lamberth ordered Iran to pay more than $813m in damages and interest to the families of the 241 U.S. servicemen that were killed, writing in a ruling that Tehran had to be "punished to the fullest extent legally possible... Iran is racking up quite a bill from its sponsorship of terrorism." In April 2016, the US Supreme Court ruled that frozen assets of Iran's Central Bank held in the US could be used to pay the compensation to families of the victims.
Former Mossad agent Victor Ostrovsky, in his 1990 book By Way of Deception, has accused the Mossad of knowing the specific time and location of the bombing, but only gave general information to the Americans of the attack, information which was worthless. According to Ostrovsky, then Mossad head Nahum Admoni decided against giving the specific details to the Americans on the grounds that the Mossad's responsibility was to protect Israel's interests, not Americans. Admoni denied having any prior knowledge of the attack. Ostrovsky further claimed that among the high level officers of the Mossad there was a view that if the Americans "wanted to stick their nose into this Lebanon thing, let them pay the price." Benny Morris, in his review of Ostrovsky's book, wrote that Ostrovsky was "barely a case officer before he was fired; most of his (brief) time in the agency was spent as a trainee" adding that due to compartmentalization "he did not and could not have had much knowledge of then current Mossad operations, let alone operational history." Benny Morris wrote that the claim regarding the barracks was "odd" and an example of one of Ostrovsky's "wet" stories which were "mostly fabricated."
A Beirut Memorial has been established at Marine Corps Base Camp Lejeune, and has been used as the site of annual memorial services for the victims of the attack. A Beirut Memorial Room at the USO in Jacksonville, North Carolina has also been created.
The Armed Forces Chaplaincy Center, the site of Chaplain Corps training for the U.S. Army, Navy, and Air Force at Fort Jackson, Columbia, South Carolina, includes the partially destroyed sign from the Beirut barracks chapel as a memorial to those who died in the attack. According to Rabbi Arnold Resnicoff, one of the navy chaplains present during the attack, "Amidst the rubble, we found the plywood board which we had made for our "Peace-keeping Chapel." The Chaplain Corps Seal had been hand-painted, with the words "Peace-keeping" above it, and "Chapel" beneath. Now "Peace-keeping" was legible, but the bottom of the plaque was destroyed, with only a few burned and splintered pieces of wood remaining. The idea of peace – above; the reality of war – below."
Other memorials to the victims of the Beirut barracks bombing have been erected in various locations within the U.S., including one at Penn's Landing in Philadelphia, Pennsylvania, Boston Ma. and one in Florida. Additionally, a Lebanese cedar has been planted in Arlington National Cemetery near the graves of some of the victims of the attack, in their memory. A plaque in the ground in front of the tree, dedicated in a ceremony on the first anniversary of the attack, reads: "Let peace take root: This cedar of Lebanon tree grows in living memory of the Americans killed in the Beirut terrorist attack and all victims of terrorism around the world."  The National Museum of the Marine Corps, in Quantico, Virginia, unveiled an exhibit in 2008 in memory of the attack and its victims.
One memorial to the attack is located outside the U.S., where Gilla Gerzon, the director of the Haifa, Israel USO during the time of the attack coordinated the creation of a memorial park that included 241 olive trees, one for each of the U.S. military personnel who died in the attack. The trees lead to an overpass on Mount Carmel looking toward Beirut.
There is also an ongoing effort on the part of Beirut veterans and family members to convince the U.S. Postal Service and Citizens' Stamp Advisory Committee to create a stamp in memory of the victims of the attack, but the recommendation has not yet been approved. In the meantime, Beirut veterans have created a "PC Postage" commercially produced Beirut Memorial statue private vendor stamp (with or without the words "They Came in Peace") that is approved for use as postage by the U.S. Postal Service.
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