This book is a detailed study of the United States Marine Corps unit insignia in the Republic of Vietnam from the Marine Advisors in the early 1960s to the Marine Security Forces evacuation of the Embassy in 1975. A complete order of battle of all U.S. Marine Air and Ground Forces that served "in country" during the Vietnam War is included, in addition to United States' Allied and foreign forces serving under the III Marine Amphibious Force, culminating in over 350 full color individual unit insignia down to at least battalion and squadron levels. With its comprehensive descriptions and pricing guide for even the most highly sought after and extremely rare unofficial "in-country" (theater) made patches, this photographic reference is a must have for the military insignia collector and historian.