The Ukrainian War of Independence (1917-1921) was a conflict that emerged after the collapse of the Russian Empire during World War I. It involved various factions, including the Ukrainian People's Republic, which sought to establish an independent Ukrainian state. The war was marked by struggles against both Bolshevik forces and White Army factions, as well as conflicts with neighboring countries. The war resulted in significant territorial changes and political turmoil. Despite initial successes, the Ukrainian independence movement faced challenges from internal divisions and external pressures. Ultimately, Ukraine was incorporated into the Soviet Union, leading to a loss of sovereignty that lasted for decades.