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Assassination of Archduke Franz Ferdinand and wife
This was a major driving force leading to World War I. After this Austria-Hungary declared war on Serbia because they thought that Serbia planned the assassination. When really it was a Serbian terrorist group. -
Austria-Hungary declares war on Serbia
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Germany declares war on Russia
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Germany declares war on France
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Great Britain declares war on Germany
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Germany invades Belgium
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Battle of Marne
This battle was the first battle to use radio intercepts. It was the French against the Germans. It was fought to the North and East of Paris. The Allies won. -
Sinking of Lusitania
The Germans were not happy that the Americans were only trading with Great Britain. So a German U-boat torpedoed and sank the Lusitania. They did this because it was a British passenger ship carrying Americans. This angered the U.S. -
Battle of Verdun
Germany wanted to lead a massive attack on France. The Allies suffered the most casualties. This was one of the longest battles of World War I lasting over 1 year. -
Sussex Pledge
The Sussex Pledge was a pledge between Germany and the U.S. This pledge stated that Germany would warn non-military ships before they would sink them. Germany did this because they did not the U.S. to join the war. -
Battle of Somme
The Battle of Somme was one of the bloddiest battles ever. There were over 1 million casualties all together. This was the bloodiest battle of World War I. This battle took place at the river Somme. -
The Zimmerman Note is intercepted
The Zimmerman note was a note that Germany sent to Mexico asking them to attack the U.S. They wanted Mexico to distract the U.S. so they would not join the war. -
Russian Revolution breaks out
During WWI Russia was not happy with their government. So they started a revolution and tried to overthrow their govenment. The U.S. didn't feel so bad about that idea but it failed. -
US declares war on Germany
After many different German action the United States could not take it any longer. On April 2, 1917 the US offically joined the Allies in World War I. -
Battle of Argonne Forest
This was a battle where the French attacked the Germans at Argonne Forest. The French ended up losing the battle. This was close to then end of WWI -
The war ends
