On December 7, 1941 - 7:55am, 360 Japanese planes attacked the military base near Honolulu, Hawaii. The bombings lasted 2 hours, destroying most ships and planes. They destroyed 19 ships, 150 planes and killed 2,400 soldiers. Fortunately, America's Aircraft carriers were out into the ocean practice and were not harmed at all. Using this as an advantage, Roosevelt got the opportunity to declare war on Japan. Later, Japanese allies declared war on America. US now joined WWII after 2 years.