The United Nations came into being in 1945, following the devastation of the Second World War, with one central mission: the maintenance of international peace and security. The United Nations is responsible for maintaining ceasefires and stabilizing situations on the ground, providing crucial support for political efforts to resolve conflict by peaceful means. Those missions consisted of unarmed military observers and lightly armed troops with primarily monitoring, reporting and confidence-building roles. Which unit of the United Nations is responsible for these efforts?