High Quality Content by WIKIPEDIA articles! Marine Medium Tiltrotor Squadron 263 (VMM-263) is a United States Marine Corps tiltrotor squadron consisting of MV-22B Osprey transport aircraft. The squadron, known as the "Thunder Chickens", is based at Marine Corps Air Station New River, North Carolina and falls under the command of Marine Aircraft Group 29 (MAG-29) and the 2nd Marine Aircraft Wing (2nd MAW).