Japan's seizure of Manchuria
Japan began its invasion of Manchuria in September, 1931 and completed its control by early 1932.
The "Anschluss" or annexation of Austria by Germany happened in March 1938.
The Soviets invaded Poland from the east after Germany did so from the west in September, 1939.
The answer about Mussolini is a decoy. It was Hitler and Nazi Germany that invaded and took over Czechoslovakia, in March, 1939.
