history of the world in 100 weapons / Chris McNab combat British Infantryman versus German Infantryman : Somme 1916 / Stephen Bull weapon Browning .30-caliber machine guns / Gordon L. Rottman weapon Lewis gun / Neil Grant Letters from the front : from the first world war to the present day / Andrew Roberts vanguard series Renault FT light tank elite series Scottish Infantry units in the world wars / Mike Chappell osprey military warrior series German Stormtrooper : 1915-18 / Ian Drury ; illustrated by G. Embleton elite series U-boat crews : 1914-45 / Gordon Williamson ; ill. by D. Pavlovic osprey campaign series Gallipoli, 1915 : frontal assault on Turkey / Philip J. Haythornthwaite new vanguard series British Mark I tank 1916 / David Fletcher ; illustrated by Tony Bryan aircam aviation series Sharkmouth 1916-1945 / ill. and comp. by Richard Ward