Civil War Union Major General. He graduated from the United States Military Academy at West Point, New York in the Class of 1855. Appointed Colonel and commander of the 41st Ohio Volunteer Infantry at the outbreak of the war and was promoted to commanding a brigade in the Army of the Ohio at the Battle of Shiloh. Promoted to Brigadier General, US Volunteers in April 1863 and Major General, US Volunteers in Apr. 1865. He served with distinction at the Battles of Perryville, Stone's River, Tullahoma, Chickamauga, Chattanooga, Knoxville, Atlanta, the March to the Sea, and the Carolinas. After the war he put in years of service in the western plains and served as an observer with the German army during the Franco-Prussian War. In 1880 President Rutherford B. Hayes appointed him Chief Signal Officer with the staff rank of Brigadier General, a post he held until his death. Because of the Signal Corps' management of the Weather Bureau, A.W. Greeley's Arctic Expedition of 1881 came under his command. General Hazen was very critical of Secretary of War Robert Todd Lincoln for not sending relief for the expedition. When rescued in 1884 only 7 of the 24 members of the party survived.
Bio by: EFB III