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A German U-boat had sunk the British passenger ship the Lusitania at great loss of life. Unrestricted submarine warfare was suspended following public outcry in the US, but was reinstated in 1917. This eventually led to the American declaration of war on Germany.

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Q: How did submarine warfare cause the U.S. to enter World War 1?
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Related questions

What was major factor in the decision US to enter world war 1?

Germany's unrestricted submarine warfare


The major reason for America's decision to enter World War 1?

unrestricted submarine warfare


Was a major factor in the decision of the US to enter World War 1?

Germany's unrestricted submarine warfare


The US decided to enter the war in response to?

Germany's return to unrestricted submarine warfare.


When did US enter wwl?

in 1914 they entered the war because of propaganda,sinking of lusitania, submarine warfare etc


What two German actions caused the US to enter Wold War 1?

The Zimmermann Note, submarine warfare


What had the greatest effect in moving the US toward participation in World War 1?

Submarine warfare was abhorrent in the US during WW1. The British sank US ships trying to enter blockaded German ports. The same is true of US ships trying to enter blockaded British ports. However the Germans use submarine warfare to sink a USS Lusitania. That was the tipping for the US. Prior to then we were not wanting to get into "entangling alliances.


Were Americans Universal in their desire to enter World War 1?

No. Its reason for joining the War is because the three ships that were, sank shot by Germany as they used the illegal power (unrestricted submarine warfare). Alvin Saptauli


Why was is it in the best interest for the US to enter World War 1?

It was in the best interest for the U.S. to enter ww1 because Germany was using unrestricted submarine and naval warfare. Example: Germany sunk a British passanger ship named the Lusitania with many U.S. Citizens on board.


What events led the US to enter world war 1 1?

by Gerrnan submarine


What three events led the US to enter world war 1?

by Gerrnan submarine


How did the you-boat attacks in the spring of 1917 help bring the US into world war 1?

"Unrestricted submarine warfare" led to a u-boat sinking of a passenger ship, Lusitania, with US citizens on board. This was the official excuse to enter the war.