Little is known about the soldiers who fought in the Hundred Years War, though much about tactics and weapons. Adrian Bell's book redresses the balance: he explores the 'military community' through focusing on the records of the two royal expeditions led by Richard Fitzalan, earl of Arundel, in 1387 and 1388, where the extensive surviving evidence makes it possible to identify those who served on these expeditions, and to follow their careers. These campaigns are not only interesting for the wealth and concentration of materials surviving on military organisation, but also because of the political background against which the expeditions were undertaken, which included the attack upon the favourites of the King in Parliament by the Lords Appellant and the possible temporary deposition of Richard II. Advances made in historical computing techniques have made possible for the first time such detailed analysis of the personnel of a royal army. ADRIAN R. BELL lectures in history at the University of Reading.