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25.000
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At the outbreak of World War II
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Germany increased its U-boatproduction by 1000%.
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Mass producing 17 new U-boats a month.
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Hitler knew the key to winningthe war in Europe...
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was to control the Atlantic.
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And control it, they would.
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By the end of 1942,German U-boats working in groups...
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known as "wolfpacks",sunk over 1,000 allied ships.
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This success gave Germanya decisive advantage.
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They were winning the war,and if this trend continued...
:01:19
all of Europe would fall.
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IN ENEMY HANDS
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In January 1943, President Roosevelt,and Prime Minister Churchill...
:01:30
declared that stopping the U-boatswould be their top priority.
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With the US fully committed to the war,and new advances in technology...
:01:40
the allies strike back.
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After losing an averageof only five U-Boats a month...
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Germany suffers its greatest lossesin what would be known as Black May.
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That month, allies sinkand destroy 41 U-Boats.
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