1) U.S. A.C.Co 1917 trench knife, 8 7/8 inch triangular spike blade, with a smooth wood grip, and a metal knuckle guard with triangular flanges and makers marks on the inside. With a green leather and steel sheath. 2) U.S. L.F.&C. 1917 knife, 9 inch blade, pyramid flanges, leather sheath. 3) U.S. Springfield bolo, 10 1/4 inch blade with 1913 date, oval guard, spring-loaded retainer and a grooved wood grip. Leather and canvas covered sheath. 4) Au Lion brand 1918 trench knife, 6 1/2 inch blade with "U.S. 1918" marked brass grip, metal sheath. 5) U.S. L.F. & C. 1918 trench knife, as 4 with 6 3/4 inch blade, trimmed-down guard.