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The war started in July-August 1914 after the assassination of Archduke Franz Ferdinand by the Serbian terrorist grou,p the Black Hand -
Gallipoli Campaign, April 1915: Where the Allied powers tried to capture the Gallipoli peninsula but were unsuccessful -
The Sinking of Lusitania, May 7, 1915: It was a British passenger ship that was sunk by the Germans and killed 1,198, including 128 Americans -
The Battle of Verdun, February 21, 1916: This was one of the longest and bloodiest battles of the war, with the Germans attacking Verdun, the French Fortress city -
Leo Joseph Bailey enlisted in 1917 and was in the 9th Infantry Regiment, and this is where they were stationed in 1918 -
America joins WWI April 6, 1917: America joins the war after the Zimmerman Telegram message which was a secret message to get from the Germans to Mexico for an alliance and told them that they would get their territories back from the U.S. but Mexico did not accept and told the U.S. and we joined the war after that.