Photograph of the drilling cavalry on the Mexican Border. The second cavalryman from the right has his service revolver pointed in the air.

Photograph of the drilling cavalry on the Mexican Border. The second cavalryman from the right has his service revolver pointed in the air.

The postcard captions reads: "Firing 4.7” Gun. W. H. Horne Co. El Paso, Tex." The 4.7 inch Field Gun M1906 was designed and issued by the US Army Ordnance Department in 1906. There is no accompanying information to positively identify the troops in the postcard or the exact location of this event. The postcard is addressed to J.R. Teague, Framingham Massachusetts, 114 Hollis Av. The postcard is postmarked El Paso, Texas, February 13, 1918, 2 PM.

Photograph of fancy riding by the U.S. Cavalry. One of the men, who has just completed the jump on an obstacle course, is carrying the banner which designates the 5th Cavalry M Company. In the distant background are the Franklin Mountains. Left of center is Sugarloaf Peak. The Cavalry competition is being held in front of the officer’s quarters in the new Fort Bliss on Lanoria Mesa.

Photograph of the 8th Cavalry playing mounted tug-of-war. Two teams comprised of men and horses have been formed and are set to battle each other in a tug-of-war competition. The postcard was not mailed and has no postmark.

Postcard of soldiers airing beds at a military camp on the border after a storm. Text on the reverse of the postcard reads: "We air our tents every other day and it is some sigh to look across the camp and see them all furled."

Postcard depicting a tent being aired out. The cloth top of the tent has been pulled away so that the tent can be aired. Soldiers stand around the structure.

Photograph of Ambulance Corps #2 and Field Hospital Corps #2 in Pennsylvania. This postcard is addressed to Miss India McKenzie, 5922 – 457h Avenue SE, (unknown) City. The postcard is postmarked out of Portland, Oregon, 12 July 1917.

Postcard of a U.S. Army airplane has the markings 48 written across its fuselage. The airplane is a Spad styled two-seater model type biplane.

Photograph of an army caterpillar tractor pulling heavy artillery through mud. The flatbed wagon has become stuck in the mud. Marines are attempting to get the wagon out of the mud with the assistance of the tractor.

The postcard caption reads: 'U.S. Ambulance picking up wounded soldiers on the Battlefield.' In this image, three soldiers are transporting a wounded soldier on a field stretcher from the battlefield onto the waiting horse- or mule-drawn ambulance, which already contains another wounded soldier. At right, a fourth soldier and a man wearing dark-colored civilian clothes (possibly a news reporter or photographer) are observing. Behind them, other soldiers are visible around wagons of supplies and horses, with mountains in the background. The soldier at the head of the wounded man has a cigarette in his mouth and he is also carrying a military sidearm in his leg holster.

Photograph of an ambulance transporting wounded soldiers from a Mexican battlefield. The field ambulance is carrying four men. Two of the soldiers are laying down on gurneys, while the other two soldiers are sitting upright. One of the soldiers is wearing an arm sling. The words "Maximum 8 Patients" are displayed on the side of the vehicle.

Photograph of field wireless used by U.S. Troops. Two soldiers are turning a portable, hand cranked power generator. A wire goes from the generator to a device located on the ground.

Photograph of an army truck train transporting troops. The caravan is traveling through city neighborhoods. Army mule supply wagons can also be seen traveling along the same street.

Photograph of U.S. Army Troops riding horses through a very shallow river.

Postcard of an army artillery unit crossing a river. It is unclear if these troops are American or Mexican Federal troops.

Photograph of a bayonet drill. The army soldiers are practicing close quarters combat or hand to hand combat in preparation for their bayonet drilling exercises. To the right, bayonet practice dummies wait to test the soldier’s marksmanship. The rifles in this image are M1903 Springfield rifles.

Postcard depicts soldiers performing a bayonet drill. In the photograph, dummy bundles of straw hang from a wooden structure. The soldiers attack the bundles with bayonets. Postcard is addressed to J. R. Teague of Framingham, Massachusetts, 114 Hollis St. Postcard is postmarked from San Antonio, Texas July 6, 1918 at 5:30 P.M.

Postcard image of an unidentified woman and two small children standing along the Rio Grande river. According to the caption, the family is looking back towards El Paso del Norte and are bidding farewell to their native land. El Paso del Norte is now known as Ciudad Juárez. There is no corroborating information about the identities for this small family. We also do not know if the woman is the mother, grandmother, or someone else related to the children. The family appears to have all of their belongings with them. Two men can be seen in background. The Mexican Revolution displaced many families along the U.S. Mexico Border and some families never returned back to their beloved homes.

Postcard of the Rio Grande River bending around an unknown area in the Big Bend National Park. The Big Bend National Park is in Brewster County, Texas and contains approximately 801,163 acres of protected land according to the National Park Service website. Big Bend is named as such because of the many and vast curves that the Rio Grande river takes in this area of the Texas southwest. There is an unidentified wood shack in the foreground of the image. And on the other side of the river, there is a group of four unidentified individuals relaxing on the river bank.

Photograph of soldiers breaking a horse on the border.

Photograph of soldiers breaking a horse on the border.

Aerial view of Camp Cotton, El Paso, Texas. This photograph was taken south to north with the Franklin Mountains in the background. A soldier riding an Indian Motorcycle is visible in the center of the photograph.

Aerial view of Camp Cotton, El Paso, Texas. In the lower center of the photograph, a soldier is visible riding an Indian Motorcycle.