From the back of the 144-page hardcover book:
"Tour of Darkness is the Vietnam sourcebook for the Weird Wars roleplaying game. It includes complete information on the geography, history, weapons, equipment, vehicles, and combatants of the 'Nam, from the French period to the arrival of the United States and their eventual withdrawl.
Inside you'll find a host of new Edges and Hindrances, rules for Sanity, Madness, artillery and airstrikes, Mission Generators for both the French and US armies, and a complete Plot Point Campaign to discover the true source of evil in the 'Nam!
Tour of Darkness requires the Savage Worlds Roleplaying Game to play."