The Organisation armée secrète (OAS) was created in Madrid by French military officers opposed to the independence of Algeria. Many of its members would later join various anti-communist struggles around the world. Some, for example, joined the Cité catholique fundamentalist group and went to Argentina, where they were in contact with the Argentine Armed Forces. Jean Pierre Cherid, former OAS member, took part in the 1976 Montejurra massacre against left-wing Carlists. He was then part of the Spanish GAL death squad, and participated in the 1978 assassination of Argala, one of the ETA members who had killed Franco's Prime minister, Luis Carrero Blanco, in 1973.