On July 17, 1936, the Spanish Civil War begins as a revolt by right-wing Spanish military officers in Spanish Morocco and spreads to mainland Spain. From the Canary Islands, General Francisco Franco broadcasts a message calling for all army officers to join the uprising and overthrow Spain’s leftist Republican government. Within three days, the rebels captured Morocco, much of northern Spain, and several key cities in the south. The Republicans succeeded in putting down the uprising in other areas, including Madrid, Spain’s capital. The Republicans and the Nationalists, as the rebels were called, then proceeded to secure their respective territories by executing thousands of suspected political opponents. Meanwhile, Franco flew to Morocco and prepared to bring the Army of Africa over to the mainland.