Hi guys welcome to Gyan Amrit Coaching . In this content we shall try to learn about United Nations and their roles, in this content we will also see the challenges faced by the UN in the 21st century. UN day is celebrated every year on 24th October to mark the anniversary of foundation of the day. This day reminds the importance of peace, security and cooperation among countries and provides a platform for discussion. After the devastating World War II , it was created to promote peace and security and prevent future world war. Every year theme of the UN day varries. Roles of the UN. 1. To promote peace, security and cooperation . This was the main objective behind the formation of UN. 2. To prevent future wars. As we know the the last world war was fought in 1945 since then no world war has happened, so it is one of the big achievements of the UN which prevents future war like world war. 3. It send peace keeping forces to conflict zones. T he United Nation has its own armed for...