Ah dammit, english loses again
Recommended: John Keegan
I´ve read (and highly recommend) these by John Keegan:
The Face of Battle (1976)
Who Was Who In World War II (1978)
Six Armies in Normandy (1982)
The Mask of Command (1987)
The Second World War (1990)
A History of Warfare (1993)
The First World War (1999)
The Iraq War (2004)
Check him out here: http://en.wikipedia.org/wiki/John_Keegan