Röth was badly wounded while serving with an artillery regiment. He transferred to the German Air Force after recovering from his wounds but was injured in a flying accident during training. In and out of hospitals for nearly two years, Röth eventually scored his first three victories on 25 January 1918. On that day, he shot down 3 enemy balloons in less than ten minutes. On 30 July 1918, he scored his 17th victory, shooting down a Bristol Fighter flown by John Cowell. Röth was wounded in action on 14 October 1918. By the end of the war, he was Germany's highest scoring balloon-buster. Of his 28 confirmed victories, 20 of them were balloons.
Extremely depressed that Germany had lost the war, Röth committed suicide. His Knight's Cross of the Military Order of Max-Joseph was awarded posthumously in 1919.