<human>:  Why did the Imperial Japanese Navy sink the USS Arizona?
<bot>: The Japanese Navy had a long-standing policy of sinking any ship that sunk their ships. This was a major reason why the Japanese lost the war. The USS Arizona was a battleship, and the Japanese were not afraid of battleships. They were afraid of submarines, and the USS Arizona was a very old battleship. The Japanese thought that the ship would be sunk by a submarine, so they decided to attack it.