Reader's Companion to Military HistoryCovers major events and battles, commanders and theorists, weaponry and technological advances, and strategy and tactics. Thematic articles cover such topics as courage, discipline, the effects of weather on warfare, military justice, surrender, the role of propaganda, the use of animals in war, the evolution of uniforms, psychological warfare, and morale.
Google Books link -- limited accessibility (approx. 60 pages). Includes D-Day and Battle of Stalingrad.