Complex sentence: In the summer of 1942 the German armies entered territories inhabited by the Cossacks, there in the open steppe resistance was futile, but nevertheless many, despite their hatred of Communism refused to collaborate with the invaders of their country.
Split into simpler sentences: In the summer of 1942 the German armies entered territories inhabited by the Cossacks. There in the open steppe resistance was futile, but nevertheless many, despite their hatred of Communism, refused to collaborate with the invaders of their country.