Schumacher joined Jagdstaffel 10 in March 1918 but was sidelined by illness from 4 April to 6 May, missing a month at the front. On his return he had five confirmed claims (three observation balloons and two French-flown SPADs) before being wounded on 24 July 1918.[2]
^Above the Lines: The Aces and Fighter Units of the German Air Service, Naval Air Service and Flanders Marine Corps, 1914–1918, pp. 206-207
References
Above the Lines: The Aces and Fighter Units of the German Air Service, Naval Air Service and Flanders Marine Corps, 1914–1918. Norman Franks, Frank W. Bailey, Russell Guest. Grub Street, 1993. ISBN0-948817-73-9, ISBN978-0-948817-73-1.
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