Polish–Ukrainian War

The Polish–Ukrainian War was an armed conflict fought mainly from November 1918 to July 1919 between the West Ukrainian People’s Republic and the Second Polish Republic over Eastern Galicia.

Battle of Lwów: A battle for Lwów fought between Polish and Ukrainian forces from November 1918 to May 1919. The struggle for this strategic city began the war and shaped its early course.
West Ukrainian People's Republic: A Ukrainian state proclaimed in Eastern Galicia in November 1918 after the collapse of Austria-Hungary. Its claim to Eastern Galicia brought it into conflict with the newly restored Polish state.
Paris Peace Conference: The 1919–1920 negotiations that established postwar settlements after World War I. The Allied powers debated Eastern Galicia’s status while Polish rule expanded there.
Polish–Ukrainian War of 1918–1919: An armed conflict over Eastern Galicia between Polish and Ukrainian forces from 1918 to 1919. This commonly used date-based name distinguishes the war from later Polish–Ukrainian conflicts.
Ukrainian Galician Army: The military force of the West Ukrainian People’s Republic during the Polish–Ukrainian War. It was the republic’s principal army against Polish forces in Galicia.
Second Polish Republic: The Polish state restored in 1918 after more than a century of partition and foreign rule. Its leaders sought to incorporate Eastern Galicia into the new republic.
Council of Ambassadors: An Allied body that handled international disputes and aspects of the postwar settlement after World War I. It recognized Polish sovereignty over Eastern Galicia in 1923, years after the fighting ended.
Ukrainian War of Independence: A series of conflicts from 1917 to 1921 over control and independence in Ukrainian territories. The Galicia war was one regional front in a broader struggle for Ukrainian statehood.
Polish Army: The armed forces of the Second Polish Republic, organized during the restoration of Polish statehood. Its reinforcements and campaigns turned the balance against the Ukrainian Galician Army.
Dissolution of Austria-Hungary: The breakup of the Habsburg monarchy in 1918 into successor states and contested territories. Imperial collapse removed the authority that had governed Galicia and opened a struggle over sovereignty.

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