1919 CE

The Treaty of Versailles ends World War I between Germany and Allied Powers, imposing reparations and redrawing borders; the Greco-Turkish War begins as Greece invades Anatolia, sparking the Turkish War of Independence; the Polish–Soviet War erupts over borderlands between Poland and Soviet Russia; the Irish War of Independence starts as the Irish Republican Army fights British rule; the May Fourth Movement rises in China against imperialism and Japanese encroachment; and the Hungarian Soviet Republic briefly becomes Europe’s first communist state before falling in the Hungarian–Romanian War.

In the 1910s, the 20th century.