Which retail innovation was FIRST implemented by the Army & Air Force Exchange Service (AAFES) to improve morale for deployed troops during combat operations?

Military exchanges (PX/BX) have evolved significantly over the decades, serving military personnel and their families worldwide. These retail operations have unique challenges and innovations that set them apart from civilian retail. This poll tests your knowledge of how military retail operations have innovated to serve those who serve.

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Mobile field PX units that could rapidly deploy to forward operating bases
Online ordering system with delivery to combat zones
Personalized loyalty program with combat zone bonus points
Tactical gear subscription boxes with rotating essential items