 Complete the following phrase:  The Group participated in a wide variety of support missions during the Vietnam War, ranging from assault missions to medical evacuation and logistical flights using CH-53A Sea Stallions, HMH-462, UH-1 E gunships, HML-367, CH-46, HMM-164, HMM-265, and UH-34 Seahorses, HMM-362. In 1968, it was closely involved in support of 