In September 1939, Polish Army units (including the 11th Carpathian Infantry Division and the 24th Infantry Division under the command of General Kazimierz Sosnkowski) fought battles against the Germans in the vicinity of Lelechówka and other localities in the Janów Forests. Dozens of Polish soldiers from the 2nd battalion of the 53rd pp of the 11th Carpathian Infantry Division (numbers ranging from 80 to 100 soldiers are given), who fell in the Battle of Three Mounds, were buried in a forest cemetery near the village of Lelechówka, where Hungarians and Ukrainians who fell during World War I were laid to rest.

On the grave is a wooden cross with a plaque in Ukrainian. This sign of remembrance was set up in 1991. The memorial area is fenced. The inscription (translated into Polish) reads: "Here are buried the victims of the wars 1914, 1918, 1939 / Ukrainians, Poles and Hungarians".