Answer:
Great Depression
Explanation:
The Great Depression was the worst economic downturn in the history of the industrialized world, lasting from 1929 to 1939. It began after the stock market crash of October 1929, which sent Wall Street into a panic and wiped out millions of investors.
Answer:
Mutual defense alliances was a significant cause for starting World War I. Basically, what happened was all of the countries were somehow alliances with other countries. Conflict between different countries caused the allied countries to be involved which eventually led to World War I.
Explanation:
