The reason the US got involved during WWII was Japan bombing Pearl Habor, therefore United States declaring war against Japan
Saudi Arabia would be the answer
Explanation:
Woodrow wilson did acomplish his hopes for short time until others starting fighting and creating bigger problems than before. There were secrets that were against the league of nations and it was supposed to create peace but became more of war. eventually others started taking advantage of the league of nations making it to fail.