From 6 June until 29 August 1944, the Allies disembarked several huge armies in Normandy. 21st Army Group is, without doubt, one of the best books we have seen on this subject. Packed with detailed information it is the perfect book to begin research on the various units that took part in the battle for Normandy. The book examines the organization of the 21st Army Group as a whole and is in to two distinct sections, the US divisions and the British, Canadian, Polish and French divisions and units. There is a detailed history of each division with a study of their leaders, their methods, their...