Serbia
Japan
The pros for the United States joining World War 1 include the reputation of a strong country,they had many alliances, and political gain on the world system. The cons of them joining the war include death, great casualties, and the loss of military strength.
It was the Japanese sneak attack on the American base at Pearl Harbor on Dec. 7, 1941.
German U-boats sunk the the Ship the Lusitania. It was carrying American civilians. America was close to joining the war, this just pushed America into it faster and on the side of England.
allied powers & every country had its own reason for joining the war
America declaring war on Nazi Germany and joining the Second World War in Europe.
Its World War 1 u idiot...
because world war 1
nobody cares
The Allies won.
The Russians pushed from the East. The Allies pushed from the North and South.