The Abschwangen massacre was a massacre committed by Russian troops during World War I on 29 August 1914 in the occupied village of Abschwangen (now Tishino) near Preussisch Eylau some 30 km (19 mi) south of Königsberg, in which 65 German civilians, including 28 locals and 37 refugees from other places, were killed.

After the return of the car to Almenhausen, the Russian troops executed nine civilians (Mayor Herman Prang, Farmer Stadie, Hermann Marienberg and six unknown refugees), who were by chance standing next to them and burned down 70 buildings out of 81 existing houses.

At the same time some other troops marched to Abschwangen, where they started to execute the male inhabitants and burned down houses and farm buildings.

During the massacre, 65 people (28 locals, 37 refugees from southern East Prussia) were killed: Due to the German success at the Battle of Tannenberg, Russian troops retreated from the Abschwangen region, and the village was recaptured without a struggle by German troops on September 3, 1914.

A memorial was built to the 74 killed civilians in 1924, but it, like the whole village, was destroyed during World War II in 1945.