America refused to recognize the right of Germany to declare unrestricted submarine warfare and continued to ship war materials. ... When the Germans sunk the Lusitania American civilians were killed in the "unprovoked" attack. The outrage over this atrocity provided the reason for America to enter the war.
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The New Testament is the document that standardized Christian beliefs.
New Testament is the second part of the Bible, which talks about Jesus and his miracles in more detail.