 On 29 July 1918 Büchner shot an American Sopwith Camel down in flames with just 14 rounds.His wingman, Leutnant Werner Niethammer, cited this combat as an illustration of Büchner's skill as a marksman; according to Niethammer's account, Büchner had no sooner spotted the American than he had set the enemy aircraft on fire.This would be the last of his seven victories in July.