Leopoldo Eleuteri was a flying ace in which deadliest conflct in history?
World War I: World War I (WWI or WW1), also known as the First World War, the Great War, or the War to End All Wars, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918. World War I:  It was one of the deadliest conflicts in history, and paved the way for major political changes, including revolutions in many of the nations involved.
i don't know