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Assassination of Franz Ferdinand (June 28, 1914) 

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Assassination of Franz Ferdinand (June 28, 1914) 

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Ferdinand was on his way to an event, when someone named Cabrinovic attempted to throw a bomb at Franz's car, but hit the wrong one. Unharmed, Ferdinand and his wife went to the even anyway. Ferdinand, in his car, happened to run into Princip, who fired two shots at him. Both Ferdinand and his wife died. This is one of the main causes of the first World War.

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Austria-Hungary Declares War on Serbia (July 28, 1914)

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Austria-Hungary Declares War on Serbia (July 28, 1914)

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One month after Franz Ferdinand was killed by a Serbian nationalist, Austria-Hungary declared war on Serbia. Before Austria-Hungary went in with military force, they asked Serbia to meet all ten demands. Serbia refused too meet all ten demands. This fight split Austria-Hungary.

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The First Battle of the Marne (Sept. 6-12, 1914)

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The First Battle of the Marne (Sept. 6-12, 1914)

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This battle marked the end of Germany's sweep into France and the beginning of the trench warfare. The battle occurred30 miles from Paris. The Germans were running low on supplies, which resulted in the victory of the Allies.

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A German U-boat torpedoed an Allied passenger ship, sinking it, killing 1,198 people, 128 of them being American. At this time, the United States was neutral, and this even strained the relationship between them and Germany. This event was a major factor in the U.S eventually joining the war.

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A message that the British intercepted from Germany. The message told Mexico that Germany would back them up if they declared war on the U.S. If the British hadn't intercepted the message, then Mexico would have gotten it, and they might've declared war on the unsuspecting United States.

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America Officially Joins the War (Dec. 7, 1917)

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America Officially Joins the War (Dec. 7, 1917)

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When the war started, Woodrow Wilson decided to stay neutral. One of the reasons America became part of the Allies, was German U-boats were sinking ships with Americans on them, especially the incident involving the Lusitania. President Wilson wasn't happy that American were being killed by Germans. In 1917, America officially joined the war, joining the Allied side fighting against Germany.

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This was between Russia and the central powers. This treaty ended Russia's participation in the war. Russia was an Ally, which meant the Allies lost one of their own.

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This act made it illegal to speak negatively about the government. This act gave the government the power to imprison or deport anyone deemed a threat to the government and the war efforts. This act was later deemed unconstitutional.

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Second Battle of the Marne (July 15-18, 1918)

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Second Battle of the Marne (July 15-18, 1918)

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It occurred near the Marne River in the Champagne region of France. This battle is considered to be the German's final offensive push of WWI. The Allies claimed victory over the Germans. This battle led to the Allies ending and winning the war.

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One of the largest American offensives. On the night of July 18th, there were violent thunderstorms as the Allies were getting into position. There were 107,000 Allied casualties, and 168,000 German casualties. This battle marked the turning point of war. Because of this battle, the Germans remained on the defensive for the rest of the battle.

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This battle marked the beginning of "hundred days." Germany was exhausted and running low on supplies. This was another battle won by the Allies. With the end of the war so soon, this battle helped to end the war.

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Battle of Saint-Mihiel (Sep. 12-16, 1918)

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Battle of Saint-Mihiel (Sep. 12-16, 1918)

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During this battle, the Allies had superiority in the air, with over 1,000 planes and 400 tanks. This attack had been meticulously planned by the Allies, and they hoped it would catch the Germans by surprise. On September 12th, there were 7,000 Allied casualties, including 4,500 killed. There were 22,000 German casualties, 2,000 killed, and 10,000 became prisoners. This battle was an Allied victory. It was also the first U.S led offensive.

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Meuse-Argonne Offensive (Sep. 26, 1918 until Nov. 11, 1918)

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Meuse-Argonne Offensive (Sep. 26, 1918 until Nov. 11, 1918)

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This battle was a big part of ending the war as the Allies continued to claim victory. This battle lasted 47 days in total. One of the largest offensives in military history. It's known as the deadliest battle, resulting in 28,000 German deaths, 26,277 American deaths, and an unknown number of French deaths.

(Sep. 26, 1918 until Nov. 11, 1918)

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By the end of 1917, the Bolsheviks had gained power in Russia. They immediately sought out Germany to negotiate peace. By 1918, the war was in the Allies favor. Finally, on November 11, 1918, Germany signed an armistice with the Allies.

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Treaty of Versailles is Signed (June 28, 1919)

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Treaty of Versailles is Signed (June 28, 1919)

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The treaty if Versailles was signed at the Palace of Versailles in Paris. This treaty created peace terms between the Allies and Germany. This treaty held Germany responsible for the war. Ultimately, this marked the end of WWI.