Ilich Ramírez Sánchez, also known as Carlos the Jackal or simply Carlos, is a Venezuelan who conducted a series of assassinations and terrorist bombings from 1973 to 1985. A committed Marxist–Leninist, Ramírez Sánchez was one of the most notorious political terrorists of his era, protected and supported by the Stasi and the KGB. After several bungled bombings, Ramírez Sánchez led the 1975 raid on the Organization of the Petroleum Exporting Countries (OPEC) headquarters in Vienna, during which three people were killed. He and five others demanded a plane and flew with a number of hostages to Libya.

On 21 December 1975, six terrorists attacked the semi-annual meeting of OPEC leaders in Vienna, Austria; the attackers took more than 60 hostages after killing an Austrian policeman, an Iraqi OPEC security officer, and a Libyan economist. Several other individuals were wounded. The self-named "Arm of the Arab Revolution" group was led by Carlos the Jackal. The siege resulted in complex diplomatic negotiations. It ended two days later, after flights to Algiers and Tripoli, with all the hostages and terrorists walking away from the situation. The fact that this was one of the first times that Arab states were targeted by terrorists also led to them being more cooperative in developing antiterrorism efforts at the United Nations.