1. One of the most important of why the US entered ww2 is because of the Japan attack on pearl harbor. Also, they entered this war to help the French and the British fight off the Germans. 2. the Manhattan project was the first detonation of a nuclear bomb. They built this weapon in fear that the Nazis will get in control of this nuclear power and bomb the world. we used this invention in Japan because of the attack on pearl harbor. 3.as we know a lot of men were recruited for this war so a lot of jobs were left behind so women had t take over these jobs to maintain homeland economy balanced, also they kept the houses up and running during hard times.
