Luis Carrero Blanco, 1st Duke of Carrero-Blanco (March 4, 1903, Santoña, Cantabria – December 20, 1973, Madrid) was a Spanish admiral and statesman. In July 1936, when the Spanish Civil War erupted, Carrero Blanco found himself behind the coalescing Republican line. Taking refuge in the embassy of Mexico and later that of France, he was able to sneak across the front and reach the Nationalist side in June of 1937. Carrero Blanco then served in the Nationalist navy. After the Nationalist victory and subsequent installation of Generalísimo Francisco Franco as military dictator (Caudillo) of Spain, Carrero Blanco became one of his closest collaborators as well a chief of naval operations.
He was said to be in opposition to Spain entering World War II on the side of the Axis powers, a notably different political position compared to some other Falangists. Carrero Blanco himself was a monarchist. Devoted to the Roman Catholic Church, he was close to Opus Dei. After as political career of many positions, he reached its zenith in June 1973 upon being named Prime Minister of Spain and made a top deputy to Franco. It seemed as though it was only a matter of time before he would succeed the ailing dictator. Blanco was assassinated in 1973 in Madrid by four members of the ETA.