28, 2026 with the delivery of its last MV-22B Osprey tilt-rotor aircraft, completing its Program of Record (PoR) of 359 aircraft. This milestone shifts the Marine Corps’ focus from fielding the aircraft to sustaining and modernizing the fleet for… pic.twitter.com/CUu20vbSg1 — U.S. Marines (@USMC) July 29, 2026In the U.S. Marine Corps, the Osprey attained Initial Operational Capability (IOC) in 2007. A Marine MV-22B Osprey with Marine Medium Tiltrotor Squadron (VMM) 268 (Reinforced), Marine Rotational Force – Darwin 26, during Exercise Pitch Black 26 in Darwin, Australia, Jul. We remain focused on efforts to enhance fleet readiness, capability and modernization of the MV-22B Osprey, the backbone of the Marine Corps for decades to come.” A Marine MV-22B Osprey assigned to VMM 363, MAG 24, 1st MAW, hoists a survivor in a rescue basket during water rescue training at Kaneohe Bay, Marine Corps Base Hawaii, July 10, 2026.