Question

hitlers invasion of the dropdown with options: soviet union, middle east, european union, allied nations in june 1941 proved that he would consistently break agreements.

Explanation:

In 1939, Hitler signed the Molotov-Ribbentrop Pact (a non-aggression agreement) with the Soviet Union. His invasion of the Soviet Union in June 1941 directly violated this pact, demonstrating his willingness to break agreements. The European Union did not exist in 1941, the Middle East was not invaded by Germany in June 1941, and the Allied Nations were the opposing bloc to Germany.

Answer:

Soviet Union