What aggressive actions on the part of European and Japanese leaders led to the outbreak of the Second World War? What role did the United States play in the war prior to entry into the fighting?
Why was Pearl Harbor attacked?

pearl harbor was attacked because the united states cut off their oil supply's

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.

the answer for 3 is b and the answer for 4 is d