Some highlighted sections see pics for all details The product is a vintage 1967 U.S. Army FM 57-35 Airmobile Operations Field Manual, an original period item from the Vietnam War era. This manual provides valuable insights into military operations during that time, offering a unique glimpse into the strategies and tactics used by the U.S. Army during the conflict. With a focus on airmobility and practical operations in the field, this manual is a collectible item that appeals to enthusiasts of militaria and those interested in the history of the Vietnam War.