Step 1: Understanding the Second World War.
The Second World War lasted from 1939 to 1945 and involved many major countries around the world. It resulted in significant political, economic, and social changes globally.
Step 2: Major consequences of the war.
After the war, the Axis Powers (Germany, Italy, and Japan) were defeated. The war also led to the creation of the United Nations in 1945 to maintain international peace and security. Another major consequence was the beginning of the Cold War between the United States and the Soviet Union.
Step 3: Formation of the League of Nations.
The League of Nations was not a result of the Second World War. It was formed after the First World War in 1920 to promote international cooperation and peace.
Step 4: Conclusion.
Therefore, the formation of the League of Nations is not a consequence of the Second World War.
Final Answer: Formation of the League of Nations.