The League of Nations disbanded itself, realizing its failures, and transfered its duties and properties to the newly forming United Nations.
The League of Nations was disbanded before World War ll, while the United Nations continues to operate in the 21st century.
Both were formed in response to a major war.
The precursor to the Current United Nations was called the League of Nations. The League of Nations was founded in 1919. When the United Nations was formed in 1945, the League of Nations basically ceased to exist.
United nations
The forerunner of the United Nations was called the League of Nations.
Original Answer: Because they are decades away. Improved: The United Nations are not a country. They couldn't have "joined" the League of Nations. The League of Nations was the predecessor of the United Nations - the League of Nations failed, and so, many years later in 1942 (I believe it was that year) they founded the United Nations as an improved "League of Nations."
Nothing. The League of Nations was the predecessor to the United Nations. (:
There is no League of Nations. We have United Nations
The League Of Nations
The United States was not a member of the League of Nations.
The United Nations has NOT formed any cities.
The League did not have a powerful armed force and could not enforce the required resolutions. It could not keep its economic sanctions. It failed to prevent the second world war. Hence it was replaced by the United Nations.