World War 1 was led by President Woodrow Wilson as the President of the United States during that time period. Germany used submarines called U-boats during the war. An important event was the Zimmermann Telegram, which was a secret diplomatic communication from the German Foreign Office sent in 1917. The fighting of World War 1 ended on November 11, 1918 with an armistice, or temporary cessation of hostilities, between the Allied nations and Germany. Veterans Day originated from the end of World War 1 to honor those who served.

1. History 17a History