"Officers and Soldiers of the French Army 1914" and "Officers and Soldiers of the French Army 1918, (1915 to Victory)", both written by Andre Jouineau, (Histoire & Collections) are now available. I have the editions translated into English, (sometimes rather questionably), but the extremely thorough treatment deserves recommendation for its clarity and comprehensiveness. There are separate pages of illustrations por rank markings, and even individual drawings of buttons where these differ from the usual form. Collar tabs, armbands and other details are also shown. as well as the army in france, there are illustrations of theZouaves,Algerian Tirailleurs, African Light Infantry,Foreign Legion,African Chasseurs,Spahis; also Colonial Troops and Marines. Outstanding refence material in a very clear form. ISBN 978-235250-104-6 and ISBN 978-2-35250-105-3