| June 28, 1914 |
Archduke Francis Ferdinand of Austria assassinated at Sarajevo |
| August 4, 1914 |
Germans invade Belgium |
| August 1914 |
Russians invade East Prussia and are defeated by Germans at the battle of
Tannenberg |
| September 1914 |
The first battle of the Marne saves Paris |
| April 1915-January 1916 |
Gallipoli campaign: Allies withdraw after suffering 252,000 casualties |
| May 1915 |
Italy enters war on Allies' side |
| Spring 1915 |
Germany launches offensive that forces Russia to abandon Galicia and most
of Poland |
| February 1916 |
General Pétain leads French forces at Verdun; Germans fail to capture the fortress town |
| June 1916 |
Russians suffer more than a million casualties in an offensive against Austrian
lines |
| July-November 1916 |
Battle of the Somme: Allies suffer 600,000 casualties |
| January 1917 |
Germany launches unrestricted submarine warfare |
| March 1917 |
Tsarist regime is overthrown |
| April 6, 1917 |
United States declares war on Germany |
| May 1917 |
General Pétain restores French army's morale and discipline |
| July-November 1917 |
British defeat at Passchendaele |
| Fall 1917 |
Italian defeat at Caporetto |
| November 1917 |
Bolsheviks, led by Lenin, take command in Russia |
| January 1918 |
U.S. President Woodrow Wilson announces his Fourteen Points |
| 1918-1920 |
Civil war and foreign intervention in Russia |
| March 1918 |
Russia signs Treaty of Brest-Litovsk, losing territory to Germany and withdrawing from the war |
| March 21, 1918 |
Germans launch a great offensive to end the war |
| June 3, 1918 |
Germans advance to within fifty-six miles of Paris |
| August 8, 1918 |
British victory at Amiens |
| October 1918 |
Turks are forced to withdraw from the war after several British successes |
| November 3, 1918 |
Austria-Hungary signs armistice with the Allies |
| November 11, 1918 |
Germany signs armistice with the Allies, ending World War I |
| January 1919 |
Paris Peace Conference |
| June 28, 1919 |
Germany signs Treaty of Versailles |
