I have come across so many americans who think they saved the world in both world wars. Americans only joined ww1 near the end when germany sunk 2 of their ships. They only joined ww2 because Japan attacked Pearl Harbor. They weren't even mainly fighting in Europe and they say they were the ones who defeated Germany. Here in the UK alot of us can say that Russia was the biggest help in world war 2 because they caused the most grief and took Berlin. In WW1 we were going to win anyways but the americans just came and made it a whole lot shorter than what it would have taken to win. Britain and the rest of the allies did most of the work. Where is new Zealands credit? where is France's credit? Where is Canada's credit? France made a monument for Canada for Vimy Ridge because they took vimy ridge when all else failed. Maybe americans mix up the meanings of "helped to do" and "did on our own".
The US did NOT join the war because Britain needed help, they joined because Lusitania was torpedoed by a German U-Boat.