The League of Nations never "became" the United Nations. The League of Nations was formed as a result of World War 1 and fell apart as the world moved into World War 2. During the War, those national with which the US and Britain were allied were often called "The United Nations." After the War, in 1946, a formal organization called The United Nations was created, but it was not a continuation of the old League of Nations, which had been discredited by its inability to respond to the increasing belligerency of Germany and Italy.
After World War Two
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 never "became" the United Nations. The League of Nations was formed as a result of World War 1 and fell apart as the world moved into World War 2. During the War, those national with which the US and Britain were allied were often called "The United Nations." After the War, in 1946, a formal organization called The United Nations was created, but it was not a continuation of the old League of Nations, which had been discredited by its inability to respond to the increasing belligerency of Germany and Italy.
The League Of Nations
The United States was not a member of the League of Nations.
the leagueof nations and UN
The united states was not a member of the league of nations
the league of nations