What are the masterpieces of military geography books?

Gu Zuyu's Summary of Reading History and Geography 130, and Li Pei's Grey Painting (20 volumes). The Summary of Reading Historical Maps includes 9 volumes of National Situation in Past Dynasties, 13 Provinces Maps of North and South Zhili 1 14, 6 volumes of Mountains and Rivers Source Committee, Astronomical Division 1 4 volumes of Map Introduction. The whole book is actually 130 volumes, with 36 attached drawings and 35 evolution tables. This book is not only a masterpiece of military geography, but also a masterpiece of historical geography, which occupies an important position in military art and geographical history. Grey Painting Collection is a collection of military geography works with more than 30 original works. It studies the general plan of the country's military use from the perspective of historical geography, summarizes the general trend of the world and the situation of various provinces, and puts forward some valuable opinions from the editors. The defect of this book is that there is no content in Tibet, Xinjiang and other provinces, and there is no map attached. These are obvious shortcomings.