World War I began on July 28, 1914 and did not end until November 11, 1918. The real cause of the war was also politics; people continued to blame Archduke Ferdinand of Austria. This war was fought primarily with trench warfare. Another thing that was used a lot during World War I was spies. Even though most were captured, they helped many countries. Who was Mata Hari? Mata Hari was a spy during the First World War. He was born on August 7, 1876 in Leeuwarden, the Netherlands. She was a Dutch professional dancer and courtesan, which is another word for a mistress. However, he was also a spy for both Germany and France. This is considered double agenting, i.e. spying for two countries at the same time. Unfortunately, double-crossing is risky and dangerous, which is why she didn't survive. The French suspected he was disloyal. They proved his disloyalty by discovering that he often traveled across international borders. They also intercepted information suggesting he was working for the Germans. During the trial she was found guilty, but she was noble enough not to reveal any information during the trial or before her execution. On 15 October 1917 she was executed by a French firing squad. Google says: “A firing squad is a group of soldiers tasked with shooting a condemned person.” Another spy of his kind was Carl Hans Lody. Who is Carl Hans Lody? Carl Hans Lody was also a spy during the First World War. He was a junior lieutenant in the German naval reserve. He spoke fluent English and married and divorced an American woman when World War I broke out. During his years of espionage, he spied “exclusively” for Ireland, which wanted information about Britain. However, he was a double agent for Germany. Germany provided h... half of the document......war.com/source/lody_letters.htm."History: Cases from the National Archives - Carl Hans Lody." Carl Hans Lody. Accessed 8 January 2014. https://www.mi5.gov.uk/home/mi5-history/mi5s-early-years/carl-hans-lody.html. http://wwi.lib.byu.edu/index.php/The_U.S._Sedition_Act. KEYES, ALEXA. “Top 6 Spies You Won't Suspect.” ABC News. February 7, 2012. Accessed January 7, 2014. http://abcnews.go.com/Politics/top-spies-suspect/story?id=15528916."Biography of Mata Hari." Bio.com. Accessed January 14, 2014. http://www.biography.com/people/mata-hari-9402348."US Congress Passes Espionage Act." History.com. Accessed January 7, 2014. http://www.history.com/this-day-in-history/us-congress-passes-espionage-act."US Congress Passes Sedition Act." History.com. June 15, 1917. Accessed January 20, 2014. http://www.history.com/this-day-in-history/us-congress-passes-sedition-act.