This detailed reference work contains an alphabetical catalogue of wars, battles, weapons, commanders, key words and concepts in 20th century warfare. It then provides an overview of the subject, through a series of authoritative essays that cover the major aspects of warfare. Topics covered include the background to 20th century conflict, naval warfare, the role of strategic air power, irregular warfare, land warfare and the current nuclear stalemate. More than 2000 A-Z entries fill in the background details.