Complex sentence: They meet their commanding officers, Forrest and Frater; who has already gone through nine tours, and has become estranged from his wife as well as his daughter who he says is afraid of him.
Split into simpler sentences: They meet their commanding officers, Forrest and Frater. Frater, who has already gone through nine tours, has become estranged from his wife and daughter, who he says is afraid of him.