Which packaging innovation was specifically developed during World War II to reduce battlefield casualties from friendly fire by making soldiers' equipment instantly recognizable?

Throughout history, military organizations have developed sophisticated brand strategies and packaging innovations to communicate power, build loyalty, and even recruit. From Roman insignia to modern military merchandise, armed forces have been masters of brand value creation. This trivia tests your knowledge of a fascinating packaging innovation that changed military history and how soldiers identified themselves on the battlefield.

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Orange identification strips for artillery shells
High-visibility fluorescent unit patches
Invasion stripes (black and white bands painted on Allied aircraft)
Red-striped canteen covers