Which product design innovation, initially rejected by military leadership, revolutionized tank warfare by prioritizing speed and maneuverability over armor, leading to the German Blitzkrieg tactics of WWII?

Throughout history, military equipment design has been at the forefront of product innovation. From ancient weaponry to modern defense systems, product design philosophies have shaped battlefield outcomes and military strategies. This poll tests your knowledge about a pivotal product design innovation that transformed military tactics during World War II, illustrating how industrial design challenges can lead to revolutionary military advancements.

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The Christie suspension system, allowing tanks to travel at high speeds over rough terrain
The Porsche electric drive system, reducing tank weight by eliminating traditional transmissions
The Krupp interleaved wheel design, distributing weight more effectively across soft ground
The Maybach HL series engine, providing unprecedented power-to-weight ratio for armored vehicles