How did the League of Nations contribute to World War II?

They got steven spielberg to make a 10 star movie to promote soldiers to fight this was known as saving private ryan and they war ended very un peacefully. Also they started a super soldier program lead by Colonel Nick Fury and run by lead Scientist Anthony Stark and they created and perfected the super soldier serum but it has only been perfected on One soldier known as Captain Rogers who single handly stooped the Nazi's and killed Hitler and won the was on the European front but he got frozen in time and is lost until we find the American hero