How did this happen?

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How did this happen? by Mind Map: How did this happen?

1. 1937: Japan declares war on China.

1.1. America halts trade with Japan, causing economic turmoil.

2. December 7, 1941: Japan surprise attacked Pearl Harbor in Hawaii.

2.1. Killed more than 2,000 American Military personnel.

3. December 8, 1941: America declares war on Japan.

3.1. This officially entered the United states into World War II.