Vietnam War Era Military Map

Here is a Vietnam Era Map used during the Vietnam War. This map was given to me by a friend that did 3-tours in Vietnam as a Chopper Pilot (Chief Warrant Officer-4). He told me that he did use this map during his tour of duty and he marked several area's that he had to land and take out wounded. The map is made of some type of fabric, still in nice condition. will frame it soon, approx. 40"x30".