Which retail innovation did the Army & Air Force Exchange Service (AAFES) pioneer in the 1980s that revolutionized how deployed soldiers could purchase goods?

Post Exchanges (PX) and Base Exchanges have been crucial to military morale since their inception. These military retail operations evolved significantly over the decades, providing soldiers with essentials and comforts of home while deployed. This trivia question explores a pivotal innovation in military retail that changed how service members could access products worldwide.

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

Mobile PX trucks that could follow frontline troops into combat zones
The AAFES Catalog and Mail Order system allowing soldiers to order American products from anywhere in the world
On-base convenience stores (Shoppettes) open 24 hours for night shift personnel
Implementation of the first military-exclusive credit card system