History: US Army soldiers and Mexican soldiers guarding their respective sides of the border between the United States and Mexico on International Street in Nogales, Arizona and Nogales, Sonora during the Mexican Revolution, c. 1910's. [1597x1031]

https://upload.wikimedia.org/wikipedia/commons/c/c3/Nogales_Arizona_1910-1920.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/5uvjt1/us_army_soldiers_and_mexican_soldiers_guarding/?utm_source=ifttt