A fully functioning UN Command is at the top of the chain of command of all forces in South Korea, including the U.S. forces and the entire South Korean military – if a sudden escalation of war between North and South Korea were to occur the United States would assume control of the South Korean armed forces in all military and paramilitary moves. There has been long-term agreement between the United States and South Korea that South Korea should eventually assume the lead for its own defense. This transition to a South Korean command has been slow and often postponed, although it is currently scheduled to occur in the early 2020s.