Harry G. Summers Jr. is best known as the author of an analysis of the Vietnam War, On Strategy: A Critical Analysis of the Vietnam War (1982). An infantry colonel in the US Army, he had served as a squad leader in the Korean War and as a battalion and corps operations officer in the Vietnam War. Summers was also an instructor and Distinguished Fellow at the Strategic Studies Institute at the US Army War College in Carlisle, Pennsylvania, and served on the negotiation team for the United States at the end of the Vietnam War.