The USA was not a member of the league
The USA had insisted that the allies would pay their war loans in full without a waiver, since they had insisted that France would pay the full reparations
The USA was practicing isolationism at that time and refused to interfere with international disputes
The Us had made separate agreements with Germany in the 1920s to improve both nations trades and relations such as the Dawes 1924 and Young Plans 1929
France was not very comfortable with the US relations with Germany because it had expected the US to guarantee its security in Europe against the German threat but this did not happen. The US-Franco treaty could not be approved and secured after the treaties had been signed in Paris. France's hope for the US security failed.
Britain was not ready to send army anywhere in the world to settle disputes. On this note, it isolated France in most of then post war crises, e.g the Ruhr invasion 1913. This made France scared and conscious of its security
Russia was not a member of the League and was seen as a major enemy because of its ideology , Communism and was not invited to the Paris Peace Conference by her former allies Britain and the USA
HOPE THIS WAS HELPFUL
