German Submarines Sink American Ships, March 1917 President Woodrow Wilson unarmed American merchant vessels/ships submarine warfare declaration of war German submarines hoped to avoid war German sank (sink) Germany obtained (to get) United States (U.S.) Congress March 1917 Zimmerman Telegram/Note April 1917 American shipping
German Submarines Sink American Ships, March 1917 President Woodrow Wilson submarine warfare German submarines German Germany United States (U.S.) Congress Zimmerman Telegram/Note American shipping unarmed American merchant vessels/ships declaration of war hoped to avoid war sank (sink) obtained (to get) March 1917 April 1917
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