Germany mobilizes her armed forces and declares war on Russia
Germany declares war on France
Germany declares a submarine blockade of Great Britain
Allies begin nine-month battle for the Turkish peninsula of Gallipoli
U-boat sinks the Lusitania. 1,198 civilians, including 128 Americans die.
Germany responds to U.S anger
The longest battle of the war, the Battle of Verdun, is fought to a draw with an estimated one million casualties.
US President Wilson publicly warns Germany not to continue unrestricted submarine warfare policies
Reich Foreign Secretary Zimmermann's telegram to Mexico urging her entry into war against the United States is discovered and translated by the British.
Germany again declares unrestricted submarine warfare.
President Wilson asks Congress for a declaration of war with Imperial Germany.
The first wave of the American Expeditionary Force lands in France.
The new Russian government, represented by Leon Trotsky, signs an armistice with Germany.
President Woodrow Wilson declares his 14 points as the path to permanent world peace
Germans launch the first of five major offensives to win the war before American troops appear in the trenches. German advance is finally stopped in late June
Allied counter offensives on the Somme push the German army back and into retreat
Turks sign armistice
A German republic is founded
At eleven o'clock on the eleventh day of the eleventh month of 1918, the war ends as Germany and Allies sign an Armistice.
