The North Atlantic Treaty Organization (NATO) carried out an aerial bombing campaign against the Federal Republic of Yugoslavia during the Kosovo War. The air strikes lasted from 24 March 1999 to 10 June 1999. The bombings continued until an agreement was reached that led to the withdrawal of the Yugoslav Army from Kosovo, and the establishment of the United Nations Interim Administration Mission in Kosovo, a UN peacekeeping mission in Kosovo. The official NATO operation code name was Operation Allied Force (Serbian: Савезничка сила / Saveznička sila) whereas the United States called it Operation Noble Anvil (Serbian: Племенити наковањ / Plemeniti nakovanj); in Yugoslavia the operation was incorrectly called Merciful Angel (Serbian: Милосрдни анђео / Milosrdni anđeo), possibly as a result of a misunderstanding or mistranslation.