Assassination of Luis Carrero Blanco
The assassination of Prime Minister Luis Carrero Blanco, also known by its code name Operación Ogro (), had far-reaching consequences within the politics of Spain. Admiral Carrero Blanco was killed in Madrid by the Basque separatist group ETA on 20 December 1973. The assassination is considered to have been the biggest attack against the Francoist State since the end of the Spanish Civil War in 1939.