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Ultimate Battleships

The hidden secrets of WWI's powerful weapons are revealed by draining the North Sea.

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  • Originally Aired July 23, 2018
  • Runtime 48 minutes
  • Content Rating United States of America TV-PG
  • Network National Geographic
  • Created July 22, 2020 by
    Administrator admin
  • Modified September 19, 2023 by
    kyuhyung78