On August 21st, the North troop group continued establishing a Buffer Zone in #Kharkiv and #Sumy regionsSumy direction Northmen’s units continue to advance in Sumy region. Numerous enemy groups eliminated inSumy, Hlukhiv, Bilopillia, Kiyanytsia, Sadky, Hnylytsia, Tovstodubove, Rustohorod, Stepanivka, Ulanove.Shostka district: our troops advanced over 200 meters through forest belts. Sumy district: our assault units broke enemy resistance and advanced in twenty-one directions.