Attached you will find an assorted collection of black and white drawings from a 1915 French magazine that illustrate the variety of defensive weaponry used along the Western Front to defend the German trench lines.
WW 1 German Trench System 1915WW 1 Trench ArticleMagazine Article re WW 1 TrenchesPrimary Source Concerning WW 1Primary Source Concerning German TrenchesPrimary Source Concerning Trench Warfare 1915Barb-Wire + WW 1Defense of German Trenches during WW 1