Which war led to the establishment of the first official Post Exchange (PX) stores that revolutionized military retail operations?

The modern military retail system has a fascinating history that shaped how service members access goods while deployed or on base. From simple sutlers following armies to sophisticated retail operations, military retail history reflects both practical necessity and evolving consumer trends. Test your knowledge about one of the most significant developments in military retail history that continues to impact military families today.

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American Civil War
Spanish-American War
World War I
Philippine-American War