Ferdinand von Zeppelin served as an official observer with the Union Army during the American Civil War. During the Peninsular Campaign, he visited the balloon camp of Thaddeus S. C. Lowe shortly after Lowe's services were terminated by the Army. Von Zeppelin then travelled to St. Paul, MN where the German-born former Army balloonist John Steiner offered tethered flights. His first ascent in a balloon, made at Saint Paul, Minnesota during this visit, is said to have been the inspiration of his later interest in aeronautics.