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The Abu Nidal Organization (ANO) is the most common name for the Palestinian group Fatah–The Revolutionary Council (Fatah al-Majles al-Thawry), also known as Black June, the Arab Revolutionary Brigades, the Revolutionary Organization of Socialist Muslims, and sometimes operating as Black September (not to be confused with the Black September Organization).
The ANO is named after its founder Abu Nidal. It was created by a split from Yasser Arafat's Fatah faction of the PLO in 1974. The group has been designated as a terrorist organization by the United States, Israel, and the European Union.
The ANO was originally formed as a result of the 1974 Rejectionist Front split in the PLO, after Arafat's Fatah had pushed through amendments of the PLO's goals, which were seen as a step towards compromise with Israel. Abu Nidal then moved to Ba'athist Iraq where he set up the ANO, which soon began a vicious string of terrorist attacks.
It has not clearly defined its ideological position, but was clearly opposed to any form of compromise or negotiation with Israel. It is known as one of the most uncompromisingly militant Palestinian groups ever. It had an estimated membership of several hundred, but its strength today is not known.
The ANO has been especially noted for its uncompromising stance on negotiation with Israel, treating anything less than all-out military struggle against Israel as treachery. This led the group to perform numerous attacks against the PLO, which had made clear it accepted a negotiated solution to the conflict. Fatah-RC is believed to have assassinated PLO deputy chief Abu Iyad and PLO security chief Abu Hul in Tunis in January 1991. It assassinated a Jordanian diplomat in Lebanon in January 1994 and has been linked to the killing of the PLO representative there. Noted PLO moderate Issam Sartawi was killed by the Fatah-RC in 1983. In the late 1970s, the group also made failed assassination attempt on the present Palestinian president and PLO chairman, Mahmoud Abbas. These attacks, and numerous others, led to the PLO issuing a death sentence in absentia against Abu Nidal. In the early 1990s, it made an attempt to gain control of a refugee camp in Lebanon, but this was thwarted by PLO organizations.