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The Assassination of Archduke Franz Ferdinand
He was shot and killed in order to gain land.This led to Germany attacking Belgium -
World War 1 Begins
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Germans Fire
The Germans fire shells filled with chlorine gas at Allied lines. This is the first time that large amounts of gas are used in battle, and the result is the near-collapse of the French lines. -
US joins the WWI-The Sinking of the Lusitania
On May 7, 1915, a German U-boat sank the Lusitania, a British passenger ship sailing off the coast of Ireland. More than 100 Americans were killed. -
The Zimmermann Telegram
Arthur Zimmermann, a German leader, sent a telegram to Mexico asking the country to start a border war with the United States. In return, Germany would get back Mexican land that had become Texas, New Mexico and Arizona. -
The United States Enters the War
After the Zimmermann Telegram, Wilson asked Congress for a declaration of war on April 2, 1917. Wilson said the United States must go to war because the world “must be made safe for democracy.” War was officially declared against Germany on April 6, 1917. -
World War 1 Ends
