The change in World War II was very significant. Since the United States of America had entered World War II, there had been changes to the outcome. First and most importantly, the USA gave a big help to their allies, causing them to win the war. Also, the events taking place in Germany had been deceased earlier then they would have been. America was able to eliminate Adolf Hitler and his Holocaust. After conducting research, I can see that the United States would have probably entered World War II anyways, but the attack made that timing earlier and somewhat saved many lives in Germany. It is all in a matter of opinion, however most of the facts point to the conclusion of this statement. The United States entering World War II brought many changes and different outcomes than suspected.