The border long patrolled against Pancho Villa’s army was active in Nogales Arizona, hosting three battles (1913, 1915 and 1918). The historical anomaly of the last with suspected German support of the Mexican resistance (just after the United States entry into World War I) is hugely intriguing and underreported. 

I highly recommend this reading : https://net.lib.byu.edu/estu/wwi/comment/huachuca/HI2-06.htm

Originally built during the Apache Wars, Fort Huachuca was repurposed to house the Buffalo Soldier 10th Cavalry supporting the 35th Regiment. 

This remarkable image shows the unit posed with a full compliment of silver sports trophies. This APPEARS to be Troop C under Captain Roy V. Morledge. 

It is signed by noted Nogales photographer, Albert W. Lohn. While it is possible that the Nogales post also housed a baseball field, I cannot confirm that information. It is more likely these men are posed at Fort Huachuca and the photographer simply traveled. 

Fort Huachuca blossomed as the ‘Black Soldier’s Home in America’ with a complex network of military and social installations including two baseball fields (one named for Rube Foster - Chicago’s Negro League Owner), a football field, basketball courts and a boxing ring so famed that later Joe Lewis would train there. 

Measures 5 x 7” w/ very good outdoor contrast and nothing more to report than a thumb crease bottom edge.