Which retail innovation was first deployed by the U.S. military during Operation Desert Storm (1991) to improve product access for forward-deployed troops?

The Post Exchange (PX) system has been a vital part of military life for generations, offering soldiers access to goods and services while deployed. Over the years, military retail has evolved significantly with innovative approaches to serve personnel in challenging environments. This poll tests your knowledge about a groundbreaking retail innovation that changed how the military delivers products to frontline troops.

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Mobile PX trucks ("Tactical Field Exchanges") that brought retail products directly to remote forward operating bases
Satellite-based digital ordering system allowing troops to order items for delivery via supply helicopters
Containerized PX units that could be rapidly deployed and assembled at temporary bases
Personal shopper service where rear-echelon personnel would fulfill requests from frontline troops