The Illustrated Encyclopedia of 20th Century WEAPONS and WARFARE Vol. 9-24
Dive into the comprehensive world of 20th-century military technology and tactical maneuvers with the selection of 16 books from the original 24-book set from the « Illustrated Encyclopedia of the 20th Century: Weapons and Warfare. ».
Illustrated History of 20th Century Weapons & Warfare Vol 1 HC 1977
You will find that the illustrated maps show trade routes clearly.