Archduke Franz Ferdinand were assassinated by Serbian nationalist Gavrilo Princip
Period: to
countries started to declared war on each other
The Battle of Tannenberg begins
The First Battle of the Marne begins
Battle of Ypres begins
- The Second Battle of Ypres begins. It is during this battle that the Germans first use poison gas.
The Battle of Gallipoli begins
The Battle of Verdun begins. The Battle of Verdun was the longest battle of World War I and was one of the bloodiest
The Battle of Jutland, the major naval battle of the war, begins
The Battle of the Somme begins. During the Battle of the Somme, tanks are first introduced into battle
Germany sends the secret Zimmerman Telegram to Mexico in an effort to entice Mexico to join the war. The British intercept and decipher the coded message.
The United States declares war on Germany.
The Battle of Passchendaele begins.
- Russia signs the Treaty of Brest Litovsk, which is a peace treaty between Russia and the Central Powers.
The Second Battle of the Marne begins.
Germany signs the armistice at Compiegne, France. Fighting ends on the 11th hour of the 11th day of the 11th month.
