IFOR relieved the UN peacekeeping force UNPROFOR, which had originally arrived in 1992, and the transfer of authority was discussed in Security Council Resolution 1031. Almost 60,000 NATO soldiers in addition to forces from non-NATO nations were deployed to Bosnia. Operation Decisive Endeavor (SACEUR OPLAN 40105), beginning 6 December 1995, was a subcomponent of Joint Endeavor.