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June 28, 1914
On this day in 1914, Archduke Franz Ferdinand of Austria and his wife Sophie are shot to death by a Bosnian Serb nationalist during an official visit to the Bosnian capital of Sarajevo. -
February 18, 1915
The first German U-Boat campaign of the war begins with unrestricted attacks against merchant and passenger ships in the waters around the British Isles. -
may 7, 1915
A German U-Boat torpedoes the British passenger liner Lusitania off the Irish coast. It sinks in 18 minutes, drowning 1,201 persons, including 128 Americans. President Woodrow Wilson subsequently sends four diplomatic protests to Germany. -
February 21, 1916
a shot from a German Krupp 38-centimeter long-barreled gun which would stretch on for 10 months and become the longest conflict of World War I. -
July 1, 1916
the Somme Offensive, was one of the largest battles of the First World War. -
November 7, 1916
American voters re-elect President Woodrow Wilson who had campaigned on the slogan, "He kept us out of war." -
january 19, 1917
British cryptographers deciphered a telegram from German Foreign Minister Arthur Zimmermann to the German Minister to Mexico, von Eckhardt, offering United States territory to Mexico in return for joining the German cause. -
April 6, 1917
the U.S. joined its allies--Britain, France, and Russia--to fight in World War I. -
December 16, 1917
Soviet Russia signs an armistice with Germany. With Russia's departure from the Eastern Front, forty-four German divisions become available to be redeployed to the Western Front in time for Ludendorff's Spring Offensive. -
january 1, 1918
Understanding the truth was a semiweekly newspaper published by the command of the British army in Iraq in 1918–19. At the time, Britain was at war with the Ottoman Empire, which had ruled Iraq since the 16th century. -
september 26, 1918
The U.S. 1st Army and French 4th Army begin a joint offensive to clear out the strongly defended corridor between the Meuse River and the Argonne Forest. -
november 11, 1918
Germany, bereft of manpower and supplies and faced with imminent invasion, signed an armistice agreement with the Allies in a railroad car outside Compiégne, France. End of the Worl War I