Didier Andres, born in Verviers in Belgium, was passionate about military history and particularly about American vehicles of World War II. He had a large archive of documents and imagery, and contributed to books and magazines for over twenty years. He was the author of U.S. Army Chevrolet Trucks, U.S. Army Ambulances & Medical Vehicles, U.S. Army Signal Corps Vehicles, and U.S. Army Diamond T Vehicles.