Complex sentence: The expedition is documented in the "Life of St. George of Amastris", a hagiographic work describing the Rus' as "the people known to everyone for their barbarity, ferocity, and cruelty".
Split into simpler sentences: The expedition is documented in the "Life of St. George of Amastris". This hagiographic work describes the Rus' as "the people known to everyone for their barbarity, ferocity, and cruelty".