I spied a small shovel at an antique mall, bigger than an entrenching tool, short handle. Clearly stamped on the blade and handle, A.E.F., Engineers, which would place it to 1918, didn't buy it as the price was high and the backside of the blade, where the handle ferrule starts, twas badly rusted through. I do have a set of butter knives, 1920s or so, very nicely engraved not stamped, U.S.Q.M.C. United States Quarter Master Corp. Probably from an officers mess.