Siege of the Montaa Barracks

The Battle of Montaña Barracks (July 19-20, 1936) occurred shortly after the July 17 coup attempt led by General Francisco Franco. The loyalist Republican forces, including militias from various political groups like the Communist Party and anarchists, successfully defended Madrid's Montaña Barracks against Nationalist rebels. Despite initial setbacks, the Republicans, supported by Assault Guards, Civil Guards, and militias (including the famous Fifth Regiment), broke through rebel defenses with air support on July 20. The battle resulted in heavy losses for the Nationalists, with many officers killed or captured. Madrid remained under Republican control, but the broader civil war continued until Franco's victory in April 1939. This battle highlighted the early dynamics of the conflict and the resilience of the Republican forces.