False.
The United Nations was established as a direct result of the World War II. Its aim was to replace the League of Nations (which became ineffective at that time), fight the Axis Powers, prevent future wars, and promote world peace. It was established on October 24, 1945. However, the Cold War between the United States and USSR posed challenges within the organization during its early years.
When it started, the United Nations was only comprised of 51 nations. Today, it is made up of 193 countries. Its main headquarters is situated in Manhattan, New York City, but it has other branches in different locations such as Geneva, Nairobi, and Vienna.