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The sinking of the RMS Lusitania , by U-Boat U-20 , caused a public outcry and helped to form a mind set that led to the public's acceptance of the US entry into the First World War .

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Unrestricted submarine warfare by Germany during World War I was a significant factor in the US entry into the war. The sinking of American civilian ships, such as the British liner RMS Lusitania in 1915, which resulted in the loss of American lives, created public outrage in the United States. This, combined with intercepted German communications proposing a military alliance between Germany and Mexico, known as the Zimmerman Telegram, ultimately pushed the US to declare war on Germany in 1917.

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Q: How might unrestricted submarine warfare have led to US entry into World War I?
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How did Germany's unrestricted submarine warfare lead to american entry into ww1?

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What role did unrestricted submarine warfare have on the us during world war 1?

In WW1, the German policy of unrestricted submarine warfare irritated neutral nations such as the United States and eventually helped public opinion to support the US entry into the war. In WW2 the German policy of unrestricted submarine warfare in the Atlantic irritated nominally neutral nations such as the United States and provided a rationale for increasing US support of Britain and its allies. In WW2 the American policy of unrestricted submarine warfare in the Pacific probably contributed to the degradation of Japanese economic capabilities as the war progressed.


What event brought the United States into ww1?

There was no single event that drew the US into World War I in 1917. The sinking of the Lusitania in 1915 along with continued submarine warfare against American commerce made the US entry into the war almost inevitable.


What country released the Sussex pledge?

The Sussex pledge was a promise made in 1916 during WWI by Germany to the US prior to the latter's entry into the war. Early in 1916, Germany instituted a policy of unrestricted submarine warfare, which allowed armed merchant ships and not passenger ships to be torpedoed without warning. Despite this avowed restriction, a French cross-channel passenger ferry, the Sussex was torpedoed without warning on March 24, 1916; severely damaged, and about 50 people died. Although no US citizens were killed in this attack, President Woodraw Wilson declared that if Germany continued this practice, the United States will break diplomatic relations with them. Fearing the entry of the United States into World War I, Germany tried to appease the United States by issuing, on May 4, 1916, the pledge, which promised a change in Germany's naval warfare policy. The promise held to these points:Passenger ships will not be targeted; Merchant ships willnot be sunk until the presence of weapons was established, if necessary by a search of the ship; Merchant ships will not be sunk without provision for the safety of passengers and crew.In 1917 Germany became convinced that they could defeat the Allied Forces by instituting unrestricted submarine warfare before the United States entered the war. The pledge was therefore rescinded in January 1917, thereby initiating the decisive stage of the so-called first battle of the atlantic. The resumption of unrestricted submarine warfare and the Zimmerman telegram caused the United States to declare war on Germany on April 6, 1917.


Why did America fight in ww1?

Germany's unrestricted U-Boat policy promted the US entry into WW-1. Zimerman (a German emabassador) told Mexico that if they helped Germany defeat America, then Mexico can have all the American land. This caused the Americans to join the war.

Related questions

How did Germany's unrestricted submarine warfare lead to american entry into ww1?

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What German policy contributed to the US's entry into World War 1?

Unrestricted submarine warfare (in the Atlantic).


What role did unrestricted submarine warfare have on the us during world war 1?

In WW1, the German policy of unrestricted submarine warfare irritated neutral nations such as the United States and eventually helped public opinion to support the US entry into the war. In WW2 the German policy of unrestricted submarine warfare in the Atlantic irritated nominally neutral nations such as the United States and provided a rationale for increasing US support of Britain and its allies. In WW2 the American policy of unrestricted submarine warfare in the Pacific probably contributed to the degradation of Japanese economic capabilities as the war progressed.


What hastened the US's entry into World War 1?

The largest factor was Germany's program of unrestricted submarine warfare; even attacking neutral ships in British waters, resulting in the deaths of many Americans.


What event triggered the American entry into World War 1?

German submarine warfare


What were the causes results of American entry into World War 1?

The immediate cause of American entry into World War 1 was the German submarine warfare that targeted American ships. In addition, the interception and publication of the infamous Zimmermann Telegram, in which Germany proposed a military alliance with Mexico against the United States, further pushed the U.S. to join the war. American entry ultimately tipped the balance in favor of the Allies and led to their victory. Additionally, it accelerated social and political changes in the United States, as well as increased American influence on the world stage.


What sparked the united states involvement in world war 1?

The sinking of the Lusitania was the spark for US entry into WW I.


What did speed up the entrance to World War 1?

For the US, what sped up its entry into World War One was the German declaration that unrestricted submarine warfare was going to begin again. This meant that US ships traveling back and forth from Europe or basically anywhere would be sunk by German Submarines. This German policy basically forced the US under Woodrow Wilson to enter the war in 1917.


What was unrestricted submarine welfare?

Unrestricted submarine warfare is a type of http://www.answers.com/topic/sea-power in which http://www.answers.com/topic/submarine sink merchant ships without warning, as opposed to attacks per http://www.answers.com/topic/prize-law-1 regulations. While providing the submarine with strongly increased lethality and greater chances of survival against its hunters, it was also considered by many as a substantial breach of the rules of war, especially when employed against http://www.answers.com/topic/neutral-country vessels in a war zone. There have been three major campaigns of unrestricted submarine warfare: # The http://www.answers.com/topic/battle-of-the-atlantic-1914-1918-1 during http://www.answers.com/topic/world-war-i, waged intermittently by http://www.answers.com/topic/germany between 1915 and 1918 against http://www.answers.com/topic/united-kingdom and her allies. This warfare was also ostensibly the casus-belli for the http://www.answers.com/topic/united-states entry into the war in 1917. # The http://www.answers.com/topic/battle-of-the-atlantic-1939-1945-1 during http://www.answers.com/topic/world-war-ii between 1939 and 1945, waged by Germany, mainly against Britain and her allies. # The http://www.answers.com/topic/pacific-war during http://www.answers.com/topic/world-war-ii between 1941 and 1945, waged by the United States against Japan. All the three cases centered around attempts to navally blockade countries (Britain, Japan) heavily depending on merchant shipping to supply their war industries and feed their populations, even though the countries waging the unrestricted submarine warfare were unable to institute a typical http://www.answers.com/topic/blockade. I hope this is good =)


What event provoked America to enter world war 1?

The sinking of the ocean liner RMS Lusitania on May 7, 1915 is considered one of the primary reasons for US entry into the war. Another was the so-called Zimmerman telegram, in which Germany sought to involve Mexico in a coordinated war against the US.The US did not enter World War I until April 6, 1917, 23 months after the Lusitania, but shortly after Germany announced it was re-instituting unrestricted submarine warfare.


Why were the Germans willing to risk the consequences of a return to unconditional submarine warfare?

On May 6, 1915, the RMS Lusitania was torpedoed by the German U-boat U-20, just 11.5 miles off the coast of Ireland, sinking in 18 minutes. Of the 1198 passengers who died, almost 100 were children, and she also carried 139 Americans, 128 of which died in the sinking. Among the passengers were many American and British dignitaries and luminaries of the day.The resulting world public backlash pressured the German leadership to revert to a policy of Restricted Submarine Warfare. They reverted back to Unrestricted Submarine Warfare (URSW) in 1917 to counter the British blockade of Germany, hoping to break the back of British shipping and to delay the U.S. entry into the war, but by then it was too late. Had they held fast and continued their policy of URSW after the Lusitania, WWI may have turned out much differently.Their reversion back to a URSW policy was also one of the key elements leading to the entry of the United States into WWI.


What event brought the United States into ww1?

There was no single event that drew the US into World War I in 1917. The sinking of the Lusitania in 1915 along with continued submarine warfare against American commerce made the US entry into the war almost inevitable.