The United States was the primary architect of the League of Nations but never became a member. In March 1920, the Treaty of Versailles, including the Covenant for the League had been defeated by a 49–35 Senate vote. Wilson’s insistence that the Covenant be linked to the treaty was a blunder; over time, the treaty had been discredited as unenforceable, short-sighted, or too extreme in its provisions. Nine months later, Warren Harding was elected president on a platform opposing the League.
America, however, next had to face the practical issues of dealing with the new international organization. Further, even while rejecting membership, the Republican Presidents of the period, and their foreign policy architects, agreed with many of the Leagues goals.
To the extent that Congress allowed, the Harding, Coolidge, and Hoover administrations associated the United States with League efforts on several issues. Constant suspicion in Congress that steady U.S. cooperation with the League would lead to de facto membership prevented a close relationship between Washington and Geneva. Additionally, postwar disillusionment with the war and the Treaty of Versailles diminished public support for the League in the United States and the international community.
Yet, the 50-plus countries operating collectively could not be ignored by America's statesmen. Consequently, an informal level of cooperation with the League through various unofficial channels evolved. American representatives often sat on League committees related to finance, and humanitarian issues, such as the League's Health Committee and the suppression of the opium trade. Large American organizations like the Rockefeller Foundation provided significant financial support for League projects in public health and economics.
Most important was the off-and-on diplomatic cooperation between the United States and the League through war and peace-type emergencies. During the Manchurian Crisis (1931–1932), an American representative joined the commission of inquiry sent to Japan. The Japanese subsequently left the League in March 1933 following criticism of its invasion of Manchuria. (Hitler soon after withdrew Germany from the League over re-armament issues, but America remained detached from that dispute.) Later, during the Ethiopian (Abyssinian) Crisis of 1935, the U.S. refused to cooperate with the League of Nations in placing formal sanctions on Italy. Instead, it invoked neutrality legislation that imposed an arms embargo on both belligerents. As Ethiopia was less industrialized, this restriction disproportionately hurt its defensive capability against Italy.
| Ethiopian Emperor Haile Selassie's 1936 Address to the League of Nations Came to Symbolize the League's Failure at Peacekeeping |
The League stopped intervening in subsequent international crises including the Spanish Civil War and Germany's occupation of Czechoslovakia. It effectively got out of the peacekeeping business, the main rationale for its creation. Meanwhile, by the end of the 1930s, the United States began to move away from strict isolationism, but, as a neutral, was not positioned with a broad coalition for holding off the rise of the Axis Powers.
When war broke out in September 1939, the League simply ceased work; its headquarters in Geneva remained empty throughout the war. In 1945—at the Conference in Yalta—America, Britain, and Russia formally agreed to convene a new international organization (the United Nations) when the war finished. On 12 April 1946, the League met in Geneva and formally abolished itself.
Source: U.S. Department of State