Volhynia
Volhynia is the northwestern most province of modern day Ukraine. Poland is on its western border with Belarus to the north.
For centuries Volhynia had belonged to the Lithuanian Commonwealth. It was later acquisitioned by Poland, through a marriage of royalty. In the first partition of Poland in 1772, the region was annexed by Russia.
It stayed part of Russia until after World War I. The Treaty of Versailles in 1920 split Volhynia in half. The east remained part of Russia while the west was returned to Poland.
After World War II, the entire region of Volhynia was made part of Ukraine,
which in turn was part of the Union of Soviet Socialist Republics.