Justus Grassmann

Lieutenant Justus Grassmann was a World War I flying ace credited with ten aerial victories—seven enemy airplanes and three observation balloons.

Aerial service

Grassmann originally served with Flieger-Abteilung 32. He joined Jagdstaffel 10 10 at the age of 21, on 17 October 1917. He did not score his first win until 5 June 1918; however, he continued to score until November 5, just before the Armistice. He is believed to have shot down and wounded William Samuel Stephenson, on 28 July, ending his combat career.