April 6, 1917 United States declaration of war on Germany 6 Apr 1917US declares war on Germany April 6, 1917 April 6, 1917 April 6, 1917 April 6, 1917 April 6, 1917 April 6, 1917 1917年4月に宣戦を布告した April 6, 1917 April 6, 1917 declared on 6 April 1917 April 6, 1917 April 6, 1917 April 6, 1917