The 1923 Draft Treaty of Mutual Assistance was an unsuccessful proposal made by the League of Nations to address the issue of disarmament and security in Europe after World War I.
[3] A leading British diplomat Lord Robert Cecil helped prepare the proposal for the League's Temporary Mixed Commission for Disarmament (TMC).
In the context of Europe in the 1920s, the specific fear was that Germany could quickly rearm and threaten the neighbour, and the disarmed members of the League would be helpless to stop it.
Finally, in September 1923 a French draft retitled the "Treaty of Mutual Assistance" was supported by the majority, with a large dissenting minority.
The draft treaty was discussed at the League Assembly in September 1923, but was ultimately rejected, primarily due to objections from Great Britain, which feared committing troops that it wanted to keep in reserve to defend the British Empire.