Pearl Harbor came as a surprise to the U.S., so Roosevelt was able to do nothing about it.
The US was still following the policiy of isolationism.
The United States. They knew. They did not know how soon it would happen
Japan thought the U.S.A was trying to stop their expansion.
The first wave of the Japanese attack on Pearl Harbor began at 7:48 A.M. local time on December 7, 1941. The second wave ended approximately 90 minutes later around 8:30-8:40.
The attack on Pearl Harbor on December 7th 1941 was a surprise military strike by the Japanese (Operation Z). It was a preemptive strike to stop the US entering Japanese waters.
Maybe because it was a sneak attack?
Loved it Full Stop.
Japan bombed Pearl Harbor to prevent the US from interfering as it widened its activities in the western Pacific and invaded the Philippines and several European colonies to get access to oil and other raw materials. The attack on Pearl Harbor had nothing to do with Germany as far as either the Japanese or the Americans were concerned.
Because of Pearl Harbor, I think?
The US was still following the policiy of isolationism.
The United States. They knew. They did not know how soon it would happen
Japanese aggression in China.
Japan thought the U.S.A was trying to stop their expansion.
the Japanese invasion of China was the main reason. the united states warned the Japanese to stop there china campaign and leave china or the will stop suppling them with oil. they used there remaining oil to attack pearl harbor and start their pacific campaign.
the answer to this question is to get out of your mums basement, get a job and stop posting questions about Pokemon :D
Pearl harbor ended on the same day, December 7th, 1945 at around 9:30 am. Yamamoto, the admiral in control of the Japanese fleet decided against a third wave because they had already lost the element of surprise.
President Franklin Roosevelt did NOT start world war 2. It was started by Germany (the Nazi's and Hitler began taking over countries next to them and committing genocide) and Japan (attacked china and the u.s. - pearl harbor attack). President Roosevelt declared war on Japan when Japan bombed Pearl harbor. After that we joined our allies to defend Europe and declared war on Germany. The Japanese part of the war ended when the next president dropped the nuke on japan to stop them from harming the u.s. anymore. It worked, Japan surrendered.