The Nazis invaded Czechoslovakia.
The Prague Spring was a period of political liberalization in Czechoslovakia during the era of its domination by the Soviet Union after World War II. The Prague Spring ended with a Soviet invasion, the removal of Alexander Dubcek as party leader and an end to reform within Czechoslovakia.
Germany.
Czechoslovakia
The Hindenburg Line.
There was no single leader during WW1. Each country had their own leader.
Bulgaria, Czechoslovakia, Hungary, Poland, Romania
Joseph Stalin was the leader of the Soviet Union during World War II.
The leader of the SS during WW2 was Heinrich Himmler .
Antonia Solandra was a leader in Italy during world war I. Antonia Solandra was a leader in Italy during world war I.
Hideki Tojo was the leader of japan in world war 2.
== == Ukraine was not independent during WW2, therefore it did not have a leader. It was a part of Russia