|Unit||Jagdstaffel 12, Jagdstaffel 13, Jagdstaffel 39|
|Awards||Iron Cross First Class|
He was posted to Royal Prussian Jagdstaffel 12 on 27 February 1917, and scored his first victory with them on 24 March 1917 by downing British ace Cyril Lowe. Jörke ran up nine victories by 18 September 1917. He then switched to Royal Prussian Jagdstaffel 13, and scored a single win, his tenth, with them, on 21 February 1918. In June 1918, he was posted to Royal Prussian Jagdstaffel 39 as it returned from Italy. He lasted out the war with them, scoring four more victories in August and September 1918. 
Sources of information
- Above the Lines: The Aces and Fighter Units of the German Air Service, Naval Air Service and Flanders Marine Corps 1914 - 1918. p. 138.
- The Aerodrome website's page on Jörke http://www.theaerodrome.com/aces/germany/jorke.php Retrieved on 12 April 2010.
Above the Lines: The Aces and Fighter Units of the German Air Service, Naval Air Service and Flanders Marine Corps 1914 - 1918 Norman L. R. Franks, et al. Grub Street, 1993. ISBN 0-948817-73-9, ISBN 978-0-948817-73-1.
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