World War I destroyed both empires. The Russian Revolution of 1917 led to the founding of the Soviet Union under the Bolsheviks, and subsequent civil war in Russia. A Ukrainian national movement for self-determination emerged, with heavy Communist and Socialist influence. Several Ukrainian states briefly emerged: the internationally recognized Ukrainian People's Republic (''UNR'', the predecessor of modern Ukraine, was declared on 23 June 1917 proclaimed at first as a part of the Russian Republic; after the Bolshevik Revolution, the Ukrainian People's Republic proclaimed its independence on 25 January 1918), the Hetmanate, the Directorate and the Bolshevik Ukrainian Soviet Socialist Republic (or Soviet Ukraine) successively established territories in the former Russian Empire; while the West Ukrainian People's Republic and the Hutsul Republic emerged briefly in the Ukrainian lands of former Austro-Hungarian territory.