Final answer:
Germany and Japan committed acts of aggression during the 1930s, including the invasion of Manchuria, the remilitarization of the Rhineland, the annexation of Austria, and the invasion of Poland.
Step-by-step explanation:
The acts of aggression committed by Germany and Japan during the 1930s were:
- Invasion of Manchuria by Japan: In 1931, Japan invaded Manchuria in northeastern China. The League of Nations condemned this act of aggression, but Japan withdrew from the organization and continued its military expansion in China.
- Remilitarization of the Rhineland by Germany: In 1936, Hitler's Germany sent troops into the demilitarized Rhineland, violating the terms of the Treaty of Versailles. Western democracies protested but took no action.
- Annexation of Austria by Germany: In 1938, Germany annexed Austria (Anschluss) despite international opposition.
- Invasion of Poland by Germany: In 1939, Germany launched a massive invasion of Poland, marking the beginning of World War II.