:00:00
25.000
:00:24
At the outbreak of World War II
:00:27
Germany increased its U-boat
production by 1000%.
:00:31
Mass producing 17 new U-boats a month.
:00:35
Hitler knew the key to winning
the war in Europe...
:00:38
was to control the Atlantic.
:00:43
And control it, they would.
:00:54
By the end of 1942,
German U-boats working in groups...
:00:58
known as "wolfpacks",
sunk over 1,000 allied ships.
:01:08
This success gave Germany
a decisive advantage.
:01:16
They were winning the war,
and if this trend continued...
:01:19
all of Europe would fall.
:01:21
IN ENEMY HANDS
:01:24
In January 1943, President Roosevelt,
and Prime Minister Churchill...
:01:30
declared that stopping the U-boats
would be their top priority.
:01:36
With the US fully committed to the war,
and new advances in technology...
:01:40
the allies strike back.
:01:44
After losing an average
of only five U-Boats a month...
:01:47
Germany suffers its greatest losses
in what would be known as Black May.
:01:55
That month, allies sink
and destroy 41 U-Boats.