In speech class the other day, my teacher who's a history fanatic made the claim that one of Wilson's ideas was for the League of Nations to become a United Nations with an army. However, I can't seem to find anything to back that up.
Actually, the League of Nations wasn't just Wilson's idea, he just happened to be in a position of great power at the time of its formation. So at the Paris Peace Conference, when the Covenant of the League of Nations was drafted,
"President Woodrow Wilson instructed Edward House to draft a US plan which reflected Wilson's own idealistic views, as well as the work of the Phillimore Commission. The outcome of House's work, and Wilson's own first draft, proposed the termination of 'unethical' state behavior, including forms of espionage and dishonesty. Methods of compulsion against recalcitrant states would include severe measures, such as 'blockading and closing the frontiers of that power to commerce or intercourse with any part of the world and to use any force that may be necessary...'"
So from what I can gather, it seems that Wilson's contributions and original ideas for the League of Nations didn't involve the League to have its own army, but for all the nations involved to contribute their own military power for the betterment of world peace.