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Archduke and Wife killed
Serbian Assassin killed Archduke Ferdinand and his wife. Austria was already angry with Serbia, so this was over the line. Austria went to war with Serbia a month later. -
Period: to
Alliances Drag Countries In
Austria's and Serbia's allies are dragged in due to alliances. (Germany, Great Britain, France, Russia) This is significant because this is the only reason World War 1 was world wide. -
America = Neutral
Woodrow Wilson announced the the United States is going to remain neutral during the war. This is significant because America wasn't planning on being in the war. -
First Battle of Marne
The first battle where trench warfare is used. Trench warfare was a strategy that was a way to provide more cover and safety. -
Second Battle of Ypres
First use of poison gas by the Germans. The significance of this event is poison gas was one of the main weapons that wreaked havoc. -
Battle of Verdun Begins
Longest and bloodiest battle of WW1. It is significant because of the part it took in the violent battle. -
Germany Sends Secret "Zimmerman Telegram"
Germany Sends Secret "Zimmerman Telegram" to Mexico to try to bring them into the war, but Great Britian intercepts and deciphers it. This is Significant because of the use of secret communication to try to bring another country to war. -
America Declares War!
America Declares war on Germany. This is Significant because America was one of the dominant powers in the war. -
Russia Signs Peace Treaty
Russia signs a peace treaty with the Central Powers. This is significant because Russia is trying to get out of the war by making peace. -
Treaty of Versailles
The warr is officially over. This is significant because it is the end of the war.
