League of Nations: All members must take action against an aggressor
Article Ten obliges signatories to guarantee the political independence and territorial integrity of all member nations against outside aggression, and to consult together to oppose aggression when it occurs.
Wilson did declare, that the United States would be morally bound to adhere to the League’s resolutions.,
- for Wilson, A moral bond was infinitely superior to a mere legal one. Article Ten was, for him, "a very grave and solemn obligation."
- Article 10 is the reason why the US did not ratify the treaty of Versailles