Q- How did USA entered into World War two?
Answer- USA didn’t want to enter in war as they were afraid of again economic crisis. But USA cannot keep resisted from entering in war on the other hand Japan was expanding his power in the East. It had occupied French Indo-China and was planning to attack on US naval bases in Pacific Ocean.
When Japan extended his support with Hitler and bombed the US so US cannot resist longer and throw atom bomb in Hiroshima Nagasaki of Japan, which caused a massive loss of lives. In this way USA entered in World War two.
The Hiroshima Nagasaki incident was one of the most horrible incidents in history.