Second Polish Republic
Second Polish Republic was name of Polish state from 1918 (end of WWI) through 1939 (start of WWII). When its borders were fixed in 1922 after several wars, it had borders with Czechoslovakia, Weimar Republic, Free City of Danzig, Latvia, Lithuania, Romania and Soviet Union. Józef Piłsudski was the leader during most of the state's existence.
The second polish republic, in 1939, Was invaded by Nazi Germany and the Soviet Union. Poland surrendered 39 days later.