Why We Are at War : Messages to the Congress January to April 1917. Woodrow Wilson

on the 18th of April last, in view of the sinking on the 24th of March of the cross-Channel passenger-steamer Sussex by a German submarine, without summons or warning, and the consequent loss of the lives of several citizens of the United States who were passengers aboard her, this Government addressed a note to the Imperial German Government in which it made the following declaration:

      If it is still the purpose of the Imperial German Government to prosecute relentless and indiscriminate warfare against vessels of commerce by the use of submarines without regard to what the Government of the United States must consider the sacred and indisputable rules of international law and the universally recognized dictates of humanity, the Government of the United States is at last forced to the conclusion that there is but one course it can pursue. Unless the German Government should now immediately declare and effect an abandonment of its present methods of submarine warfare against passenger and freight-carrying vessels the Government of the United States can have no choice but to sever diplomatic relations with the German Empire altogether.