The son of a successful businessman, this highly decorated German ace was 16 years old when he joined the infantry in 1914. After surviving a case of typhoid fever, Büchner served on the Russian front in 1915 before returning to the trenches of France where he was wounded in combat on 3 April 1916. When he recovered, he transferred to the German Air Force, serving first with FFA 270. Posted to Jasta 9 in March 1917, he scored his first and only victory with this unit on 17 August 1917. Büchner was then reassigned to Jasta 13 but only scored one more victory by the end of the year. During the summer of 1918, his score began to climb after downing three enemy aircraft in June. Scoring his seventh victory on 2 July 1918, Büchner shot down the Sopwith Dolphin of Irish ace Joseph Callaghan. Five days later, he scored his eighth victory over a Sopwith Camel flown by another allied ace: Merrill Taylor of Canada. With the aid of a parachute, Büchner survived a midair collision with another Jasta pilot on 10 October 1918 and although he survived the war, he was killed in action during Germany's postwar revolution.