[Caterpillar Tractor In Pinto Valley]

Photograph of a Caterpillar tractor coming up a sloped dirt road in Pinto Canyon. Several men stand on the road beside the tractor. The dry, hilly landscape is dotted with sparse shrubbery.
Date: 1917
Creator: Duncan Photo
System: The Portal to Texas History

[Line of Military Wagons and Horses]

Photograph of dozens of military wagons and horses lined up in a wide expanse of flat, bare dirt.
Date: 1917/1918
Creator: unknown
System: The Portal to Texas History

[Three Soldiers on Motorcycles]

Photograph of three soldiers riding motorbikes on a dirt path that cuts through a small rock formation. The soldier closest to the camera has a motorbike with a side car. All three men are wearing collared shirts and wide-brimmed hats.
Date: 1917/1918
Creator: unknown
System: The Portal to Texas History