Tiemann Newell Horn  Tiemann Newell Horn (January 8, 1868 - January 13, 1923) was an American military commander in the United States Army. He served as a Brigadier General during World War I.  Tiemann Newell Horn was born to Daniel Tiemann Horn and Frances Carpron Horn in Brooklyn, New York on January 18, 1869. Horn attended the United States Military Academy and graduated number nine of sixty-five of Class 1891. Horn was commissioned to the Third Cavalry and transferred to Second Artillery. From 1903 to 1906, Horn was the ordnance officer and artillery engineer for the Southern Artillery District in New York. Horn also participated in the Jamestown Exposition in 1907. From 1911-1912, Horn graduated from the Army School of the Line and Army Staff College. From 1915 to 1918, Horn was stationed in the Philippines and Hawaii. Horn was promoted to brigadier general on February 6, 1918. During World War I, Horn commanded the Seventh Field Artillery Brigade and the Seventh Infantry Division. Tiemann retired in Plainfield, New Jersey and died in Hawaii on May 5, 1923. His rank of brigadier was posthumously restored. Tiemann Newell Horn married Myra Rivers on November 28, 1894. Tiemann was an Episcopalian and Mason. He was also a member of the Society of the War of 1812.