This is a rare find for collectors of militaria. The FM 6-30 The Field Artillery Observer Department of the U.S. Army book from 1974 is an original piece from the Vietnam War era. It provides valuable insights into the role of the field artillery observer and the tactics used during the conflict. The book is a must-have for anyone interested in the history of the Vietnam War or militaria in general. It was manufactured in the United States and is a true gem for collectors of original period items. Don't miss out on the opportunity to add this piece to your collection.