This photo is from the Arizona Memory Project at the Arizona State Library, Archives and Public Records (part of the Arizona Military Museum collection), showing the 158th Infantry at Naco, Arizona on 6 October 1917. They are preparing to depart for service in World War I.
Source: Arizona Memory Project, Arizona State Library
Among the men in the 158th at the time was a Vicente Campuzano, who I believe was Vicente Jr, brother of my great-grandfather Plutarco Campuzano. I have an inquiry in with the Arizona Military Museum and Arizona State University's Archives, in the hopes that a service record for this Vicente exists. The 158th Infantry were sent to France, and later became known as the Arizona Bushmasters.
There is a lot more to this story, and I can't wait for more information.