Portrait of Wayne Back in an Army uniform and a short hair cut.

Portrait of Milton Andrew Matlock, United States Marine, in his uniform.

Photograph of four unknown World War One soldiers on horseback, all wearing their uniforms.

Photograph of three unknown soldiers standing in front of the barracks in camp; all three are wearing their uniforms and campaign hats.

Portrait of an unknown World War One soldier wearing his uniform.

Portrait of an unidentified World War One soldier standing next to a chair while dressed in his uniform.

Portrait of an unidentified World War One soldier standing in his uniform next to a chair.

Portrait of an unknown World War One soldier sitting in a chair and wearing his uniform.

Portrait of an unknown World War One soldier standing by a table in his U. S. Army uniform.

Portrait of an unknown World War One soldier in his uniform.

Portrait of Joe Back dressed in his World War One uniform.

Portrait of Oscar D. Back standing in his World War One U. S. Navy uniform.

Portrait of three unknown World War One soldiers all wearing their military uniforms. The soldiers on the left and right are sitting in chairs while the one in the middle is sitting on a table.

Portrait of Wayne Back as a World War One soldier in uniform.

Photograph of a group of soldiers in Cameron Park in Waco, Texas. Two of the soldiers can be seen sitting on outdoor parallel bars. The soldiers are positioned in front of a wooded area of the park. Handwritten text on the back identifies the WWI soldiers as Dan Ohern, George Fellers, George Jorgenson and Mirt Andrews .

World War One-era "small box respirator" gas mask, consisting of a canvas or cloth face piece, with inset glass or resin eye lenses, and straps that wrap around the back of the head. The front of the mask has a valve located behind a cloth-covered tube that goes over the mouth and attaches to a small yellow metal box containing activated charcoal (made of peach pits or the pits from other stone fruits). The wearer would have breathed only through the mouth, inhaling air scrubbed clean by the charcoal in the box, and had their nose squeezed shut by a clip inside the mask.

Postcard of the 107th Engineer Battalion in Camp MacArthur in Waco, Texas. They march in file down a grass road, led by horses between encampments in the military installation. The back of the postcard contains a list of ingredients.

Postcard of artillery at a mounted drill exercise at Camp MacArthur, Waco. Artillery batteries on wheels are pulled by horses mounted by soldiers, riding on a plain dirt field and picking up dust behind them. Other cavalry riders follow.

Postcard of the 32nd Division headquarters at Camp MacArthur, Waco. Structures visible along the dirt road are triangular, tent-like buildings with power poles and signs nearby. A large thermometer, possibly indicating the amount of liberty bonds purchased, is at center left. Cars are parked besides the road at right.

Copy print of a photograph of a soldier in uniform and a part of a larger group photograph. According to the photo this soldier's name is Mooney.

Copy print of a photograph of a uniformed soldier. This photo is zoomed in to only show this soldier's face, but he is a part of a larger group photograph. According to the photo this soldier's name is Ainsworth.

Postcard of a football team from the 127th Infantry Regiment, Company B. They mostly wear light-colored striped shirts, standing in two rows. A man at center, along the bottom row, holds a ball; a goalie with a dark shirt is seated at second from right with a helmet. One of the seated men, first from left, holds a white dog. The men stand in front of the encampments at Camp MacArthur.

Postcard displaying a long line of several covered wagons and horses along a dirt road. The postcard is captioned "Ready for Review".

Postcard of Section C in Camp MacArthur in Waco, Texas. Several wooden buildings, a wooden shed, and power poles are visible along a horizontal dirt road. Another path, perpendicular to the horizontal road, carries a column of horses. Smaller encampments, short tent-like buildings are visible at left.