the U.S.A.  because they were helping China by sending them war supplies.  Japan  didn't like this because China was the main target of Japanese  attacks.  As a result of this Japan decided to take a "peace" trip to  the U.S.A. .  They made the trip in November of 1941.  During this  "peace" trip Japan made three proposals to the government.  These  proposals were, to stop aiding China, to stay out of Asian affairs,  and to begin shipping oil to Japan right away or Japan would attack  the U.S.A. .  President Franklin D. Roosevelt and the government of  the United States didn't carry out these proposals.                   As a result of this Japan attacked Pearl Harbor on the  morning of December 7, 1941 at 7:55 AM.  The reason they attacked that  early was because Admiral Isoroku Yamamoto, the person in control of  the Japanese warships in that area, knew most of the troops at Pearl  Harbor would be asleep.                      The main planes Japan used for the attack were bombers.  The  number of bombers used was 350.  Six aircraft carriers are what these  planes were carried on. They chose to use bombers because thier  primary objective was to destroy as many ships as possible.  They did  have one squadron of fighter planes in each wave, however.  The reason  they did this was because Yamamoto predicted that the troops at Pearl  Harbor would be able to a launch a few planes.  There were two waves  of planes.  The first wave of planes were to destroy as many capital  ships as possible.  Capital ships are ships that are powerful.  The  planes that were still up and running after the first wave were to  join in the second wave.  The second wave of planes were to destroy  whatever was left after the first wave of planes finished thier  mission.  These were mostly carrier ships and submarines that were  surfaced.              During this attack exactly ten major  command ships were  destroyed.  Some of the ships that were destroyed were t...