because world war 1
Serbia
Germany
America didn't fight in world war 1
World War 1
america entered the war after pearl harbor
America's population at the beginning of world war 1 was considered mobilization. After World War One fifth of the world's population was infected.
India's economy was pushed to near bankruptcy
world war 2
It eventually pushed Germany into submarine war, which eventually brought the USA into the war.
America didn't fight in World War 1!
America