Great War Timeline


Assassination of Ferdinand

June 28, 1914

Gavrillo Princip of the Black Hand Society (Serbian) assassinates the Austro-Hungarian archduke, Franz Ferdinand.


July 28, 1914 - November 11, 1918

War begins

July 29, 1914

Austria-Hungary declares war on Serbia after Kaiser Wilhelm II of Germany issues a blank check for Austria- Hungary and Austria- Hungary issues an ultimatum to Serbia.

Summer 1914 Events

August 1, 1914 - August 6, 1914

Germany declares war on Russia, France orders full mobilization, Great Britain states that they will get involved if Belgium is invaded. France and Germany declare war on one another. Germany invades Belgium, which causes Great Britain to declare war on Germany. Austria Hungary declares war on Germany.


February 1915

British and Anzac troops sail to Russia to bring war supplies, but are stopped by the Ottomans. This battle between the Allied and Central powers ends in Ottoman victory.

2nd Battle of Ypres

April 1915

Central powers battle, only German offensive in 1915, and the first time for Germany to use gas. Fought in Ypres, Belgium.

Italy joins the war

May 1915

Italy declares war on Austria-Hungary, entering World War I on the side of the Allies—Britain, France and Russia, in the treaty of London. Italy waits to join the war until it can see which side seems to have an advantage over the other and is likely to win.

Unrestricted Submarine Warfare

May 1915

Germany's attempt to block the Allied powers from getting any war supplies by sinking any ships that came towards Allied powers' ports.

Sinking of the Lusitania

May 7, 1915

German submarines shot at an Allied passenger ship, the Lusitania, which was traveling from America to England. This event angered the Americans because around 50 Allied passengers were killed without warning.

Battles of Isozono

June 1915 - November 1917

These 12 battles are fought between the Italian and Ausrto-Hungarian troops along the Isozono River in Italy. Italy looses many troops and doesn't gain much territory- a fail.

Battle of Verdun

February 1916

This battle of attrition (Kill Everyone!!!) between Germany and France takes place in Verdun, France. German flamethrowers are used for the first time, "Bleed the French White!", and France claims the victory.

Sussex Pledge

May 1916

After the Germans torpedo the Sussex passenger ship, they are scared that the US forces will join the war. Out of fear of this happening, they create the Sussex Pledge, which states that passenger ships would not be targeted and all ships would be warned of the submarines.

Battle of Jutland

May 1916

Largest naval battle in the war between Germany and Britain. Both sides claim victory, but Britain loses more ships than Germany and about twice as many sailors.Britain had joined the war as a result of Germany's Belgium invasion.

Brusilov Offensive

June 1916

Also known as the June Advance, this was Russia's attempt to gain Central powers' territory. This war is very successful for the Triple Entente because it forces Germany to relocate some of its troops to Austria-Hungary, where the war is fought.

Battle of the Somme

July 1916

France attempts to take some pressure off of the battle in Verdun, so they start another battle in the Somme, causing Germany to relocate some of its troops. This is the first time that tanks appear, but neither side wins.

Italy declares war on Germany

August 27, 1916

August 27, 1916, Italy declares war on its neighbor, Germany

Zimmerman telegraph sent

January 16, 1917

This telegraph was sent from the Germans to the Mexicans saying that if they distracted America from joining WWI, they could have some of America's land. This telegram was intercepted, and the angered Americans joined the war.

Unrestricted Submarine Warfare resumed

January 31, 1917

Germany quits the Sussex pledge and submarines prepare to attack any ships, including civilian passenger ships, seen in war-zone waters. America is very angered by this decision and breaks diplomatic relations with Germany. Then, Germany sinks another American liner.

Russian Revolution

February 1917

The Russian government is overthrown during WWI in a series of civil wars, and the Romanov royal family is shot. This causes Russia to drop out of the war with the Treaty of Brest Litovsk, which is very helpful to the Central Powers. Because this threat is lost, Germany starts back unrestricted submarine warfare.

Battles of Gaza

March 1917 - November 1917

British troops try to knock the Ottomans out of the war in Gaza, Palestine, because they block their path to Russia and are a Central power threat. However, Britain fails as the Ottomans are very strong.

2nd Battle of the Aisne

April 1917

This battle, fought in France, is a huge fail for the French. Before the French troops fight, the Germans already know their war plans. Also, France is positioned in trenches below the enemy. This war leads to many casualties for both the Allied and Central Powers

USA enters the War

April 1917

The Zimmerman Telegram- sent to Mexico from Germany and intercepted by the allied powers, along with other causes such as the invasion of Belgium, causes the US to join the Allied powers in WWI.

US declares war on Germany

April 6, 1917

The US declares war on Germany when it joins the allied forces in Europe

Russian-German Armistice

December 1917

The Russians and Germans agree to quit fighting once Russian has to withdraw from the war. This benefits Germany because they no longer have to worry about Russia's attacks.

US declares war on A-H

December 7, 1917

The US declares war on Austria Hungary.

President Wilson's 14 Points

January 1918

US President Woodrow Wilson gives a speech to Congress after the US decides to go to war about how the war in Europe is for a moral cause to make peace. He still plans for "Peace without Victory" for the war and his troops.

Treaty of Brest Litovsk

March 1918

The Central powers and Russia sign this peace treaty so that Russia can leave the war as a result of their overthrown government. The Central powers gain part of Russia's territory and industry for Russia's withdrawal.

German Spring Offensive

March 1918

Germany's last-stitch efforts before America can build up an army and fight them. Germany realizes that their only chance of victory is to fight the Allied powers before the American troops come to fight.Germany suffers many casualties as a result of poor planning and strong allies.

2nd Battle of the Marne

July 1918 - August 1918

Germany's last major attempt in the Spring Offensive is stopped when the French and Allied forces beat them. This is an important victory for the Allied forces because it marks the beginning of many Allied victories.

Armistice Day

November 11, 1918

On this day at 11 a.m., the war ended. However, just hours before, many troops were sent to die for basically no reason.

Paris Peace Conference

January 1919

The Allied Victors meet for the Paris Peace Conference to set up the punishments for the defeated Central Powers, reshape the map of Europe, and set up peace treaties. The main four powers who came were President Woodrow Wilson of the United States, Prime Minister David Lloyd George of Great Britain, George Clemenceau of France, and Italian Prime Minister Vittorio Orlando. Communist Russia wasn't invited to the Conference.