Halo

HALO is a military acronym for High Altitude Low Opening referring to military free-falling. It is an insertion technique used for clandestine insertion into denied areas of interest. The operative exits an aircraft from twenty thousand feet or higher and free-falls to about one thousand feet before opening their parachute. Jeffery Barkil is a young soldier who, after completing his training as an airborne Ranger, is recruited by the CIA, after which he spends six months training to run "black operations" in Southeast Asia. The story takes place between the years 1958 and 1961, a period between the French surrender and expulsion from Vietnam, and the U.S. admitting they had troops in the country. Sergeant Barkil takes you on eleven harrowing missions including his time as a prisoner of the Viet Cong. You are taken from one mission to the next as Sergeant Barkil comes to terms with being a hired assassin while at the same time carrying out his missions and fighting to stay alive.