Which innovative retail strategy did the Army & Air Force Exchange Service (AAFES) first implement during World War II that revolutionized how deployed troops accessed consumer goods?

The Post Exchange (PX) system has been a cornerstone of military retail for over a century, providing servicemembers and their families with goods at discounted prices while generating funds for morale, welfare, and recreation programs. This poll tests your knowledge about the historical development and impact of this unique retail system that has shaped military life and culture around the world.

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The Mobile Field Exchange (MFE) - portable PX stores that could follow troops to forward positions
The Catalog Order System - allowing soldiers to order items from catalogs for delivery to field locations
The Ration Card Exchange - permitting troops to trade food rations for retail goods of equivalent value
The Victory Points Program - a wartime loyalty program where combat achievements earned retail credits