League of Nations was the predecessor of the United Nations which was established by the victorious states of WWI on January 10, 1920. The Great Britain, France, Italy and the United States were the main actors in this system. It was established to protect world peace and solve problems among states. However, due to its internal problems like strategies and policies of its main actors towards the losers of WWI, it became futile less than two decades. With its inability to prevent Italian invasion of Abyssinia, Japanese invasion of Manchuria and Nazi invasion of Austria and Czechoslovakia, the prestige of the institution dramatically decreased and these developments resulted in the eruption of WWII.