The Collins Encyclopedia of Military History from 3500 BC to the Present is a comprehensive 4th edition book authored by R. Ernest Dupuy and Trevor N Dupuy. Focusing on the topic of military history, this historical non-fiction work is intended for adult audiences and provides a detailed narrative of warfare from ancient times to the present day. Published by Collins in 1998, this professional edition features a dust jacket and is written in English, making it a valuable resource for those interested in the genre of military history.