What revolutionary supply chain innovation was created specifically for the D-Day invasion to solve the problem of supplying troops when no deep-water port was available?

Operation Overlord (D-Day) was not just a military triumph but also a logistical masterpiece. The Allied forces had to coordinate the movement of millions of tons of equipment, supplies, and personnel across the English Channel in what became one of history's most complex supply chain operations. This poll tests your knowledge about the supply chain innovations that made the Normandy invasion possible and helped change the course of World War II.

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Mulberry harbors - portable, artificial harbors that could be assembled at the landing sites
PLUTO (Pipe Line Under The Ocean) - underwater fuel pipelines connecting Britain to France
Liberty ships - mass-produced cargo vessels that could be assembled in days rather than months
Red Ball Express - dedicated truck convoy system that operated exclusively on one-way roads