Japan hoped it would take America so long to rebuild, by the time she was able to return in force in the Pacific, she would consider the new balance of power a "fait accompli", and negotiate a peace. However, the attack on Pearl Harbor failed to destroy the crucial targets (aircraft carriers and, most crucially for Japan's ability to hold island bases, submarines) and ignored others (oil tank farms, power station), thus the U.S. Navy was not weakened enough to force withdrawal. The psychological effect also caused the U.S. population and armed forces to fully mobilize for war. South-East Asia was quickly conquered (Philippines, Indochina, Malaysia and the Dutch East Indies). After Japan's vital aircraft carrier force was destroyed in the Battle of Midway, the Japanese had to revert to a stiff defense they kept up for the remainder of the war.