WW1: <span>The first world war began in August 1914. It was directly triggered by the assassination of the Austrian archduke, Franz Ferdinand and his wife, on 28th June 1914 by Bosnian revolutionary, Gavrilo Princip.
WW2: </span><span>the rise of Italian fascism in the 1920s. Japanese militarism and invasions of China in the 1930s. the political takeover in 1933 of Germany by Hitler and his Nazi Party and its aggressive foreign policy </span>starting<span> in 1936.
Hope this helps! </span>
Theodore Roosevelt is your answer