League of Nations - Members

Members

Of the League's 42 founding members, 23 (24 counting Free France) remained members until it was dissolved in 1946. In the founding year, six other states joined, only two of which remained members throughout the League's existence. An additional 15 countries joined later. The largest number of member states was 58, between 28 September 1934 (when Ecuador joined) and 23 February 1935 (when Paraguay withdrew).

The Soviet Union became a member on 18 September 1934, and was expelled on 14 December 1939 for aggression against Finland. In expelling the Soviet Union, the League broke its own rule: only 7 of 15 members of the Council voted for expulsion (Great Britain, France, Belgium, Bolivia, Egypt, South Africa, and the Dominican Republic), short of the majority required by the Covenant. Three of these members had been made Council members the day before the vote (South Africa, Bolivia, and Egypt). This was one of the League's final acts before it practically ceased functioning due to the Second World War.

On 26 May 1937, Egypt became the last state to join the League. The first member to withdraw permanently from the League was Costa Rica on 22 January 1925; having joined on 16 December 1920, this also makes it the member to have most quickly withdrawn. Brazil was the first founding member to withdraw (14 June 1926), and Haiti the last (April 1942). Iraq, which joined in 1932, was the first member that had previously been a League of Nations Mandate.