WW1 Timeline
June 28, 1914 - Gavrilo Princip, who has ties to the Serbian terrorist-type group the Black Hand, assassinates Archduke Franz Ferdinand of Austria-Hungary.
July 28, 1914 - Austria-Hungary declares war on Serbia.
August 2, 1914 - Ottoman Empire (Turkey) and Germany sign a secret treaty of alliance.
August 4, 1914 - Germany invades Belgium. President Woodrow Wilson declares that the United States is neutral. Britain declares war on Germany.
August 10, 1914 - Austria-Hungary invades Russia, opening the fighting on the Eastern Front.
August 1914 - Battle of Tannenberg, Prussia.
September 12, 1914 - First battle of Aisne, France.
November 3, 1914 - Russia declares war on Ottoman Empire (now Turkey).
November 5, 1914 - Great Britain and France declare war on Ottoman Empire.
May 7, 1915 - A German U-20 submarine sinks the British passenger ship, the Lusitania; 1,198 are killed, including 128 Americans.
April 22, 1915 - Second Battle of Ypres begins, marking the first use of poison gas by Germany.
June 1915-November 1917 - Battles of the Isonzo, Italy.
1915 - Battle of Krithia, Gallipoli peninsula, Ottoman Empire.
February 21-July 1916 - Battle of Verdun, France, the war's longest battle, with almost a million casualties.
May 31-June 1, 1916 - Battle of Jutland, North Sea near Denmark - a sea battle between British and German navies.
July 1, 1916-November 1916 - First Battle of the Somme River, France. The British introduce the tank.
April 6, 1917 - U.S. declares war against Germany after the interception and publication of the Zimmermann Telegram and the sinking of three U.S. merchant ships by German U-boats.
June 26, 1917 - American troops begin landing in France.
November 20, 1917 - Battle of Cambrai, France.
December 3, 1917 - Russia signs an armistice with Germany.
March 3, 1918 - Russia signs the Treaty of Brest-Litovsk, ending hostilities with the Central Powers and withdrawing Russia from this war.
March 21-April 5, 1918 - Second Battle of the Somme River.
September 29, 1918 - Bulgaria signs an armistice.
October 30, 1918 - Ottoman Empire (Turkey) signs an armistice.
November 3, 1918 - Austria-Hungary signs an armistice.
November 11, 1918 - Germany accepts the armistice terms demanded by the Allies, ending the war.
June 28, 1919 - The Treaty of Versailles is signed at the Palace of Versailles, France.
July 28, 1914 - Austria-Hungary declares war on Serbia.
August 2, 1914 - Ottoman Empire (Turkey) and Germany sign a secret treaty of alliance.
August 4, 1914 - Germany invades Belgium. President Woodrow Wilson declares that the United States is neutral. Britain declares war on Germany.
August 10, 1914 - Austria-Hungary invades Russia, opening the fighting on the Eastern Front.
August 1914 - Battle of Tannenberg, Prussia.
September 12, 1914 - First battle of Aisne, France.
November 3, 1914 - Russia declares war on Ottoman Empire (now Turkey).
November 5, 1914 - Great Britain and France declare war on Ottoman Empire.
May 7, 1915 - A German U-20 submarine sinks the British passenger ship, the Lusitania; 1,198 are killed, including 128 Americans.
April 22, 1915 - Second Battle of Ypres begins, marking the first use of poison gas by Germany.
June 1915-November 1917 - Battles of the Isonzo, Italy.
1915 - Battle of Krithia, Gallipoli peninsula, Ottoman Empire.
February 21-July 1916 - Battle of Verdun, France, the war's longest battle, with almost a million casualties.
May 31-June 1, 1916 - Battle of Jutland, North Sea near Denmark - a sea battle between British and German navies.
July 1, 1916-November 1916 - First Battle of the Somme River, France. The British introduce the tank.
April 6, 1917 - U.S. declares war against Germany after the interception and publication of the Zimmermann Telegram and the sinking of three U.S. merchant ships by German U-boats.
June 26, 1917 - American troops begin landing in France.
November 20, 1917 - Battle of Cambrai, France.
December 3, 1917 - Russia signs an armistice with Germany.
March 3, 1918 - Russia signs the Treaty of Brest-Litovsk, ending hostilities with the Central Powers and withdrawing Russia from this war.
March 21-April 5, 1918 - Second Battle of the Somme River.
September 29, 1918 - Bulgaria signs an armistice.
October 30, 1918 - Ottoman Empire (Turkey) signs an armistice.
November 3, 1918 - Austria-Hungary signs an armistice.
November 11, 1918 - Germany accepts the armistice terms demanded by the Allies, ending the war.
June 28, 1919 - The Treaty of Versailles is signed at the Palace of Versailles, France.