It was part of Czechoslovakia from 1919 until 1945, when the Soviet Union annexed it. Hungary had seized a large part of it in 1938, and held it until driven out by the USSR army.
Lithuania was the Grand Duchy of Lithuania (one of the largest states in Europe) and formed an alliance, and personal union with Poland in 1385 (The Grand Duke of Lithuania and the young Queen of...
The Czech Republic and Slovakia. Carpatho-Ukraine (Ruthenia) was also a part of the interwar republic, but was ceded to the USSR in 1945 as a part of Ukraine, whose national language is spoken by...