What did the Great Schism split?
A
the Holy Roman Empire and the Byzantine Empire

Japan imperialism :

Expansion and imperialism: Like European countries, many in the Japanese government turned expansion into a systematic goal, for security, national pride, resources for industrialization, settlement of overpopulation, and markets for manufactured goods. These goals were often intertwined.

German invasion of poland:

The German invasion of Poland was a military action by Nazi Germany aimed at annexing Polish territory. The technical operation, known as the "White Case," began on September 1, 1939, and the last units of the Polish army surrendered on October 6 of that year

German invasion of soviet union:

Operation Barbarossa, launched on June 22, 1941, was the code name given by Adolf Hitler to the plan of invasion of the Soviet Union by the Axis Forces during World War II.

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