Which military retail system first established permanent overseas stores following a major conflict, creating what would become a global retail network?

The Army & Air Force Exchange Service (AAFES) and Navy Exchange (NEX) have been serving military personnel for generations. These retail operations have a fascinating history of expansion that parallels major military campaigns and base establishments worldwide. This poll tests your knowledge about how military retail operations have evolved through conflicts and peacetime to become the global network of exchanges and commissaries we know today.

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The Army Exchange Service following World War I in Europe
The Navy Ship's Store following the Spanish-American War
The Marine Corps Exchange following the Korean War
The Air Force Exchange following the Vietnam War