This summary episode explores the Spanish Civil War (1936-1939), the devastating conflict that served as a bloody rehearsal for World War II where competing political ideologies clashed with deadly consequences. Born from the collapse of Spain's military dictatorship and the struggle of the Second Spanish Republic against economic depression and social upheaval, the war erupted when General Francisco Franco launched a military coup from Spanish Morocco in July 1936. What followed was a brutal three-year conflict that split Spain between Franco's Nationalists—backed by fascist Italy and Nazi Germany—and the Republican Popular Front, a fractured coalition of republicans, communists, and anarchists supported by the Soviet Union and international volunteers in the famous International Brigades. The episode traces key battles from the siege of Madrid to the terror bombing of Guernica, while examining how internal divisions among the Republicans, particularly the violent May 1937 clashes between communists and anarchists in Barcelona, fatally weakened their cause. Ultimately, Franco's victory came at the cost of 350,000 lives and left Spain devastated, leading to decades of dictatorship while providing the major European powers with military experience and technology testing that would shape the coming world war—though each nation would learn selective lessons that suited their existing beliefs rather than the full reality of modern warfare. Contact advertising@airwavemedia.com to advertise on History of the Second World War. History of the Second World War is part of the Airwave Media podcast network. Learn more about your ad choices. Visit megaphone.fm/adchoices