Model UN

Model United Nations is an academic simulation of the United Nations where students play the role of delegates from different countries and attempt to solve real world issues with the policies and perspectives of their assigned country. For example, a student may be assigned the United Kingdom and will have to solve global topics such as nuclear non-proliferation or climate change from the policies and perspectives of the United Kingdom. Source

Model UN began as a series of student-led model League of Nations simulations. The first simulations were called "international assemblies", the first of which was held at Oxford University in November 1921, with the potential first ever simulation being on the 12th of November 1921. Following several simulations in Oxford, the president of the first Oxford International Assembly, Mir Mahmood, traveled to Harvard in 1922 to help spread this idea further. During his trip he urged support for the League of Nations, and, seemingly inspired the Harvard Liberal Club to create the first American International Assembly held at Harvard University in 1923. Whilst the Oxford International Assembly ceased to exist in the following years, the Harvard International Assembly remained strong and since started the rebirth of these simulations worldwide. The international assemblies were similar to MUN, as participants represented countries, debated to find resolutions, and supported the idea of dealing with international disputes around a negotiating table; still an uncommon idea at the time.

After the Second World War, model League of Nations transitioned to model United Nations after the formation of the League's successor organization, the United Nations, in 1945. Today, some model United Nations conferences include simulations of the League of Nations among their committee offerings. Source