Marines recovered from this low point and began a series of successes. The Invasion of Grenada, known as "Operation Urgent Fury", began on 25 October 1983 in response to a coup by Bernard Coard and possible "Soviet-Cuban militarization" on the island. The 22nd Marine Amphibious Unit quickly took the northern sectors, and were withdrawn by 15 December. Interservice rivalry and cooperation issues shown during the invasion resulted in the Goldwater–Nichols Act of 1986 altering the chain of command in the United States military. When Operation Classic Resolve began on 2 December 1989 in the Philippines (in retaliation for the coup attempt), a company of Marines was dispatched from Naval Base Subic Bay to protect the Embassy of the United States in Manila. The Invasion of Panama, known as "Operation Just Cause" began on 20 December of the same year, and deposed the military dictator Manuel Noriega.