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Archduke Assassination
Archduke Franz Ferdinand is assassinated in Sarajevo. His death is the event that sparks World War I. -
Russia Mobilizes
Russia mobilizes its army to intervene against Austria-Hungary in favor of its ally, which is Serbia. This is important because its the move that starts a chain reaction that leads to the mobilization of the rest of the European Great Powers, and inevitably to the outbreak of hostilities. -
World War 1 Actually Begins
Belgium Germany invades Belgium, beginning World War I. This is important because it angried France, making them join the war. -
Western Front
Trenches are established along the entire Western Front, which is Germans names for their series of trenches. This is important because it started the two front war and basic start of trench warfare. -
Germans Fire
The Germans fired shells with chlorine gas at Allied lines. This is important because this is the first time that large amounts of gas are used in battle, and this almost resulted in the collapse of the French lines. However, the Germans are unable to take advantage of the breach. -
Lusitania Sinks
LusitaniaA German submarine sinks the passenger liner Lusitania. The ship carries 1,198 people, 128 of them Americans. Which led to the turning point of public opinion against Germany, both in the United States and other places -
First Tanks
The British were the first tanks ever used in battle, at Delville Wood. Although they are useful at breaking through barbed wire and clearing a path, tanks are still not perfect and they fail to be the decisive weapon. -
Submarines Back
Germany resumes unrestricted submarine warfare in European waterways. This act, more than any other, is important because it draws the United States into the war and causes the eventual defeat of Germany. -
The Zimmerman Telegram
The Zimmermann TelegraphIt essentially suggested that Mexico ally itself with Germany and together the'd try and recapture US territotry. It was important since it pushed the US resolve closer to going to war with Germany and Germany's allies in WWI. -
U.S.
Congress authorizes a declaration of war against Germany. The United States enters World War I on the side of France and Britain. This is important because it brought fresh new troops to the allies and other things the U.S. had provided, which eventually help the allies when the war. -
Russia Revolution
This is important because the Russian Revolution helped end the war because had Russia not had the Revolution Germany would not have focused all of its powers on France which then would not have led an end even had the Americans joined because there would still be soldiers on the Eastern Front. -
Germany and Russia Peace Treaty
The Germans sign a peace treaty with Russia. The terms of the treaty give Germany huge tracts of land that had been the Ukraine and Poland, and peace on the Eastern Front allows Germany to shift soldiers to the Western Front, This is important because it caused serious problems for the French, British, and Americans. -
Armistice Day
An Armistice is signed ending fighting on the Western Front. This was important because it was the "last day "of the war, -
Treaty of Versailles
Treaty of Versailles signed, it was one of the peace treaties between Germany and the Allies. This was imortant because it ended the war bewteen them. -
League of Nations
The League of nations meet, The high contracting parties meant, In order to promote international co-operation and to achieve international peace and security by the acceptance of obligations not to resort to war. This was important because it kept peace and maintained justice.
