Which war prompted the U.S. military to formally establish the first permanent Post Exchange (PX) retail systems that would eventually evolve into today's military exchange network?

The modern military exchange system (PX/BX stores) represents one of the most unique retail operations in the world, serving millions of military personnel and their families. These stores evolved from simple necessity to comprehensive retail experiences that boost morale and provide essential services. This poll tests your knowledge about the historical development of military retail operations and how they've shaped military life and logistics throughout major conflicts.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

American Civil War (1861-1865)
Spanish-American War (1898)
World War I (1914-1918)
World War II (1939-1945)