The end of June 1917 saw "Jagdstaffel 11" in frequent clashes with the opposing Canadian and British pilots of the Royal Naval Air Service. On the 24th, Allmenröder killed Naval 10's Robert Saunders in his Sopwith Triplane on a morning mission. The evening of the next day, Canadian ace Gerald Ewart Nash pounced on Allmenröder; after an epic dogfight, Nash went down to crashland behind German lines for the German ace's 29th victory. Then, on 26 June, Allmenröder shot down a Nieuport for his 30th victory.