Royal Prussian Jagdstaffel 11 ("No 11 Fighter Squadron") was founded on 28 September 1916 from elements of 4 armee's Keks 1, 2 and 3 and mobilized on 11 October as part of the German Air Service's expansion program, forming permanent specialised fighter squadrons, or "Jastas". It became the most successful fighter squadron in the German Air Service.
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