Karl I of Austria

Karl I became Emperor of Austria and King of Hungary upon the death of his great-uncle Franz Joseph I. He inherited an empire exhausted by World War I and facing internal disintegration.

Karl I secretly initiated peace negotiations with France through his brother-in-law Prince Sixtus of Bourbon-Parma. He proposed supporting French claims to Alsace-Lorraine in exchange for a separate peace, but the effort failed when Germany vetoed the terms.

As World War I ended, nationalist movements declared independence across the empire. Karl I issued a proclamation transforming Austria into a federal state, but it was too late; the empire dissolved into separate republics.

Karl I renounced participation in state affairs but did not formally abdicate. He was forced into exile in Switzerland, and the Austrian parliament formally deposed the Habsburg dynasty, ending over 600 years of rule.

Karl I twice attempted to regain the Hungarian throne, traveling to Hungary in March and October 1921. Both efforts failed due to opposition from the Entente powers and the Hungarian regent Mikl