Complex sentence: An older soldier of Yugoslavian background who gives Prew "The Treatment" when he refuses to box, and attacks Prew with a knife, causing Prew to fight back with his fists and consequently to be sentenced to the Stockade.
Split into simpler sentences: An older soldier of Yugoslav background who gives Prew "The Treatment" when he refuses to box. He attacks Prew with a knife, causing Prew to fight back with his fists and then be sentenced to the Stockade.