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.

Ian Palmer is a highly experienced digital artist. A graduate in 3D design, he has provided illustrations for many publications, from modelling James Bond's Aston Martin to recreating lunar landings. He lives and works in London with his wife and three cats.

The German Army of World War II considered itself an offensive, mobile force. The experiences in the trenches in World War I had done much to shape its concept of field fortification, and its mobile warfare ethos was intended to prevent the previous war's stalemate. This book addresses frontline defensive field fortifications, built by infantrymen using local materials, and includes rifle platoon positions, trenches, crew-served weapon positions, bunkers, dugouts, shelters and more. It also covers anti-tank and anti-personnel obstacles, as well as field camouflage methods and construction methods. The integration of these positions into permanent systems and theatre-specific defences are also discussed.