The beginning of the US official involvement in WWII when the Japanese launched an invasion on Pearl Harbor killing 2000 people. This was the first time the US was invaded in over one hundred years.
The Japanese further their expansion in the Pacific by invading Hong Kong and the Phillipines while they captured Guam. In addition they take Burma, the Wake Islands, and Borneo over this five day period.
The Japanese has just taken control of the Phillipines and 76,000 POW's are forced to walk sixty miles to a work camp. Over 12,000 of these men were Americans.
The turning point in the war where the US holds the Japanese back and keeps them from gaining the Midway Islands (the halfway point between the US and Japan). The Japanese here lose 4 carriers and the US loses 2.
The allies first take New Guinea from the Japanese when the British invade the island. US troops fight back and take over Burma. Troops in Guadalcanal push back the Japanese and they retreat from the island.
The Japanese make one last offensive in the fight for the Pacific when they attack a US airbase in Eastern China. The Japanese fail in this attack and they are now on the defensive for the rest of this war.
After weeks of fighting, the US troops break through Japanese lines and liberate Guam.
The US army begins preparation for the atomic bomb they will drop on Japan by establishing the 509th Composite Group.
The US army launches an offensive in Iwo Jima. Their troops were mainly composed of infantry units and aircraft.
Franklin Roosevelt dies on April 12 leaving his vice president Harry Truman to run the country.
On this date, the US declares victory in the Phillipines and that date is declared liberation day.
Hiroshima was struck by an atomic bomb killing nearly two hundred thousand people.
The Japanese accept an unconditional surrender after the second atomic bomb was launched on Nagasaki. Japan nearly lost three hundred thousand citizens in total in almost two weeks.