US World War II and Korean War Field Fortifications 1941-53 (Fortress)
Gordon L Rottman entered the US Army in 1967, volunteered for Special Forces and completed training as a weapons specialist. He served in the 5th Special Forces Group in Vietnam from 1969–70 and subsequently in airborne infantry, long-range patrol, and intelligence assignments until retiring after 26 years. He was a special operations forces scenario writer at the Joint Readiness Training Center for 12 years, and is now a freelance writer.