John France 
Medieval France at War [PDF ebook] 
A Military History of the French Monarchy, 885-1305

This book provides an overarching, comprehensive analysis of the French military in the medieval period. The focus is on the armies of the French monarchy and the lands close around them, extending from the Low Countries to Provence. Central themes include recruitment and payment; military organisation; leadership, strategy, and tactics; weapons and arms; chivalry, military culture, and the rise of military professionalism.