1: Why the U.S. got involved in WWII. The U.S. got involved in the war because of the attack on pearl harbor and many other attempts to attack the U.S. When the U.S. got involved. December 7, 1941 (or around there) How did the war start. It was a brew of Germany breaking it's laws from WWI, and it invading Poland.
2: Which country's were involved. Almost all of the country's were involved in WWII the big ones were, Germany, Japan, United states of America, Britain, France, and Russia, along with some smaller ones (Italy and those). Rosie the riveter. Rosie the riveter was the women spoke person of wartime (She was not really a person), she encouraged women to pick up the jobs men left behind.
3: A brief yet long summary of WWII. The war got started by tension with Japan and Germany, there were two main powers the allies and the axis powers, the Holocaust happed during WWII, it also lifted the great depression of most of the country's.
4: The weapons of WWII. The most significant weapon that came out of WWII was the atom bomb, other then that most of the weapons were the same.