During Hoover's administration, the stock market collapsed. This was such a huge deal because people were borrowing money from the banks and putting in stock market. When the collapse occurred people were unable to repay the banks the money they took out, the banks failed.
France and Britain were in dispute over the land in the Ohio River Valley.
Answer:
The German invasion of Poland. France and Britain told Hitler they would go to war with Germany if he invades Poland, so Hitler promptly invaded Poland.
Explanation:
