.....World War 1.....

WWI began in 1914 began when the Archduke Franz Ferdinand was assinated. This war was between the Allies and the Central Powers, and in the end the Allies win. The Sussex Pledge was introduced, saying that Germany promises not to attack any other country without warning. The U.S. got involved during the Zimmerman note, which was when Germany wanted to become allies with Mexico. This war also started Militarism and Nationalism and affected Europe. Europe was affected by this war because their defenses were weakened and Russia falls to Communism and the Great Depression bagan. <3