Multiple choice general knowledge history Which year did the first world war end? 1917 1918 1919 1920 Reveal answer Fill a bubble to check yourself B Correct answer Explanation World War I ended in 1918 when an armistice was signed on November 11, marking the victory of the Allies. The Treaty of Versailles in 1919 formally ended the war. The years 1917, 1919, and 1920 are incorrect as the war's end date.