Training Circular No. 21 titled "Ruses and Snares of the Enemy When Retreating". Document created by the Military Intelligence Section with this copy used at Camp Upton, NY by the 77th Division. Circular includes examples of snares and traps used by German soldiers during the retreat between Artois and the Aisne. The list is organized by location such as shelters, trenches, stables, etc. and includes precautionary measures. Dated February 18, 1918.
From the service of Captain Francis N. Bangs, MP Company, 77th Division, AEF, and Sqd. A, 1st NY National Guard Cavalry, Camp McAllen, Texas, Mexican Border, 1916