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When ever they were presented with targets of opportunity.

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Q: When did the German submarines attack the us merchant ships?
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Related questions

In what year did German submarines attack US merchant ships?

'42 thru '44.


When did German submarines attack us merchant ships?

Whenever they became a target of opportunity.


What was the reason for German Submarines attack unarmed ships?

Guerre de Course, merchant warfare.


What year did the German subs attack US merchant Ships?

We entered World War 1 because of a German submarine attack on U.S. merchant ships in 1917.


How German you-boats changed the rules of naval warfare?

Because the German navy was not a strong navy, they had to rely on submarines to attack merchant ships...Guerre de Course (Commerce Raiding).


German submarines aimed to attack ships that were carrying?

War material.


In what year did German submarines attack USmerchant ships?

'42-'44


What Adolf Hitler to order German submarines to attack American ships?

America's support of the allies led Hitler to attack American ships.


What led Hitler to order German submarines to attack American ships?

America's support of the allies led Hitler to attack American ships.


What led adolf to order German submarines to attack American ships?

America's support of the allies led Hitler to attack American ships.


What strategies did convoys use to help the allies combat German submarines?

Warships traveled with Merchant ships for protection.


What strategies did convoys use to help the allies combats German submarines warfare?

Warships traveled with Merchant ships for protection.