President Juan Perón renamed the landmark the "Edificio Libertador" in 1950 to honor the centennial of the death of General José de San Martín (known locally as the Liberator of Argentina, Chile and Peru). The tunnels connecting the building to the presidential offices helped save the populist leader's life during the September 16–19, 1955, "Revolución Libertadora" coup against him, when he took refuge in the War Ministry before being ultimately deposed and exiled. Perón returned to power in 1973, but his break with erstwhile supporters, the far-left Montoneros, led to a violent conflict between them and his successor, Isabel Perón (his widow). Among the most noteworthy attacks in this conflict was the detonation of a car bomb by the Montoneros in front of the Libertador Building on March 15, 1976, which killed a civilian staffer and wounded 29 officers, helping trigger a coup d'état on March 24.