War Factories - The Secret History of WW II: Episode 7 - US Ships | History Documentary

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The story of America’s ‘Liberty Ships’ is one of the most remarkable of World War Two. Ships had never been produced in this number, and at this speed, ever before.
As German U-Boats wreaked havoc upon the British merchant ships in the Battle of the Atlantic, a radical solution was needed to stem the unsustainable loss of vessels.

Known as Liberty ships, they became the Model T Fords of the ocean. Made in record time by workers with no ship building experience, these prefabricated vessels would roll off the production line in their thousands. As yards competed with each other to increase production rates, one yard was able to build a ship in an astonishing time of 4 days and 15 hours.

When Imperial Japan’s surprise attack on Pearl Harbour devastated the U.S. battle fleet, America harnessed its full industrial might and took mass production of shipping to a whole new level.
Within weeks of the attack U.S. shipyards had built 13 new warships, and went into production with 15 battleships, 11 carriers, 193 destroyers and 73 submarines. Over the course of the war American shipyards produced more than 100,000 ships for the U.S. Navy. As one Japanese general warned, ‘we have woken a sleeping giant.’

The United States started the war with a fleet half the size of the Royal Navy. By the end it will be larger than the combined fleets of the entire world.

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