A pair of Holt 75 Tractors. The French, British and Americans used them for moving artillery pieces.
Two infantrymen at a stateside camp. This photo may predate the war as they are wearing M1907 leggings rarely worn in France. They also have on campaign hats that did not make it to France. The M1903 Springfield rifles were adopted by the army in 1905.
An undated photo of a member of the Motor Transport Corps. Taken between 1918 and 1920 the period of time the M.T.C. existed although the canvas leggins would put my guess at 1918. The M.T.C. was responsible for bicycles, motorcycles, automobiles, and trucks.