Yale Model United Nations | 459 followers on LinkedIn. YMUN aims to empower students from high schools around the globe through active engagement with global issues. | Yale Model United Nations is a four-day international relations simulation for over 2000 high school students, typically held on Yale University’s campus in New Haven. At YMUN, delegates from all over the world interact with one another through debate and diplomacy to solve complex challenges facing the world today. At virtual YMUN, delegates will have the same opportunity to take on roles of UN representatives, policymakers, and important figures at our virtual conference and learn about the inner workings of global politics and problem-solving.