when did the marines separate from the navy
United States Marine Corps The Department of the Navy, led by the Secretary of the Navy, is a military department of the cabinet-level U.S. Department of Defense that oversees the Marine Corps and the Navy. The most senior Marine officer is the Commandant (unless a Marine officer is the Chairman of the Joint Chiefs or Vice Chairman of the Joint Chiefs), responsible to the Secretary of the Navy for organizing, recruiting, training, and equipping the Marine Corps so that its forces are ready for deployment under the operational command of the Combatant Commanders. The Marine Corps is organized into four principal subdivisions: Headquarters Marine Corps (HQMC), the Operating Forces, the Supporting Establishment, and the Marine Forces Reserve (MARFORRES or USMCR).
History of the United States Navy In March 2007, the U.S. Navy reached its smallest fleet size, with 274 ships, since World War I. Since the end of the Cold War, the Navy has shifted its focus from preparations for large-scale war with the Soviet Union to special operations and strike missions in regional conflicts. The Navy participated in the Iraq War and is a major participant in the ongoing War on Terror, largely in this capacity. Development continues on new ships and weapons, including the Gerald R. Ford-class aircraft carrier and the Littoral combat ship. One hundred and three U.S. Navy personnel died in the Iraq War.[165] U.S. Navy warships launched cruise missiles into military targets in Libya during Operation Odyssey Dawn to enforce a UN resolution.[166]