History An H-34D Marine helicopter lands to evacuate casualties during an August 1965 offensive in northern South Vietnam. An M48 Patton provides security. At Khai Tay, Marine medevac choppers arrived about 4 a.m., and the tankers helped recover bodies. (Photo by Universal History Archive/UIG/Shutterstock (2541865a)) Photo by Universal History Archive/UIG/Shutterstock (2541865a)