the revolutionary war the war of 1812 (this is the first one that wasn't a true independence war, we tried to force Canada to join us.) the civil war(this was a revolt not a war, the south was trying to retain slavery. the first world war, we helped to keep Europe out of the hands of the Germans. the second world war, again we helped to keep Europe out of the hands of the Germans, we also wanted revenge against japan. the Korean war, we kept the south independent of the north...