Pfc Hans Nielsen was one of the more than 30,000 Danish-Americans who were mobilized during the Second World War. He served in the Army Air Force.
Hans Nielsen was born on 1 June 1902 in Copenhagen. He was the son of Nicoline Hansen. Nielsen emigrated to the United States in 1923 arriving in New York on 9 October 1923 on-board the SS United States.
Nielsen enlisted in the U.S. Army on 29 September 1942 in Jefferson Barracks, Missouri. He was naturalised in March 1943, while attending 767th Technical School at Buckley Field, Colorado. Buckley Field was part of the Army Air Force Technical Training Command and a training facility for fighter armament.
 DNA: Parish register, Kristkirken Sogn.
 Ancestry: New York Passenger Lists, 1820-1957.
 Ancestry: U.S., World War II Army Enlistment Records, 1938-1946.
 Ancestry: Colorado, State and Federal Naturalization Records, 1868-1990.
 Buckley Field in World War II (part II), https://www.buckley.af.mil/News/Article-Display/Article/1251425/buckley-field-in-world-war-ii-part-ii/ (accessed on 10 April 2020).