 Complete the following phrase:  Marine Aviation and Training Support Group 33 MATSG-33 is a United States Marine Corps aviation training group that was originally established during World War II as Marine Aircraft Group 33 MAG-33. Fighter squadrons from MAG-33 fought most notably during the Battle of Okinawa and also as the first Marine aviation units to support the Korean War when they arrived as part of the 1st Provisional Marine Brigade. They helped stabilize the United Nations positions during the 