1918
The West Ukrainian People's Republic was proclaimed on November 1, 1918, with Lviv as its capital. The Republic claimed sovereignty over Eastern Galicia, including the Carpathians up to the city of Nowy Sącz in the west, as well as Volhynia, Carpathian Ruthenia and Bukovina. Although the majority of the population of the Western-Ukrainian People's Republic were Ukrainians, large parts of the claimed territory were considered Polish by the Poles. In Lviv the Ukrainian residents supported the proclamation, the city's significant Jewish minority accepted or remained neutral towards the Ukrainian proclamation, and the Polish majority was shocked to find themselves in a proclaimed Ukrainian state.
Read more about this topic: Territorial Evolution Of Poland