| 21. | Since there was limited response to this tactic, Germany expected a similar response to its unrestricted submarine warfare.
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| 22. | With the resumption of unrestricted submarine warfare in 1917, U-boats sank ships faster than replacements could be built.
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| 23. | During the German campaign of unrestricted submarine warfare and prevented the breakout of the German High Seas Fleet.
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| 24. | In order to achieve the required results, the unrestricted submarine warfare has to commence no later than 1 February.
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| 25. | Following Germany's resumption of unrestricted submarine warfare on February 1, 1917, during the neutral vessels in a war zone.
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| 26. | Almost two years later, in January 1917 the German Government announced it would again conduct full unrestricted submarine warfare.
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| 27. | The German government apologized for attacking " Gulflight ", but refused to change its strategy of unrestricted submarine warfare.
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| 28. | Bickford's decision not to fire on " Bremen " likely delayed the start of unrestricted submarine warfare in the war.
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| 29. | On April 6, 1917, Germany's policy of unrestricted submarine warfare finally compelled the United States to declare war on Germany.
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| 30. | He repeatedly warned that the U . S . would not tolerate unrestricted submarine warfare, in violation of international law.
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