⭐In April 1917 the United States declared war on the central empires, which gave the war a global character. .
⭐The event that motivated the United States to enter the war was the sinking of the Lusitania on May 7, 1915, where 123 Americans were killed by a German submarine
⭐ First World War, previously called the Great War, was a warlike confrontation centered in Europe that began on July 28, 1914 and ended on November 11, 1918, when Germany accepted the terms of the armistice.
