Which famous military product redesign was prompted by extensive battlefield feedback and fundamentally changed how armies approached personal equipment design?

Throughout history, military equipment and technology have evolved not just for functional reasons but also due to consumer behavior and product design considerations. Many innovations in military gear were driven by soldier feedback and battlefield experiences, creating a historical parallel to modern retail personalization. This poll explores how consumer behavior and product design intersected with military history in a famous case study that changed equipment standards forever.

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The M1 Helmet ('Steel Pot') replacing the M1917 'Brodie' helmet during WWII after soldier experience reports from WWI
The introduction of digital camouflage patterns replacing woodland patterns based on satellite imagery analysis
The Springfield 1903 rifle replacing the Krag–Jørgensen after the Spanish-American War battle analysis
The MOLLE system replacing ALICE packs after extensive field testing by Special Forces units in Vietnam