It was because the axis powers were attacking cruise liners.
Americans felt that if they join the war they would be fighting for their country. many felt an obligation to join, or they were forced by drafts
America joined the war in 1941 with the Sovent Union
they like tofight
cause they wanted too
It was called the Great War when the Russians joined the Serbs (Serbia) and when the Germans joined Austria-Hungary as nobody new that the Americans, British, Italiens, etc. would join and simply kept its name throughout the War until afterwards when it was realised that it was a World War.
To stop Communism spreading into South Vietnam.
cause they wanted too
the Germans wanted the Mexicans to attack usa to avoid their intervention but the Americans found out about it
Benjamin Franklin
what do you think might have happened if the americans lost the war against great Britain
Because the native Americans signed treaties with the confederacy outside of the war in the west.
African Americans could not join until after the Emancipation Proclamation.