Who is Captain Thomas J. from With the Old Breed, at Peleliu and Okinawa and what is their importance?

Stanley is a veteran officer attached to K/3/5 at Peleliu where he capably serves. The men hold him in high regard and he appears to be a normal officer in most respects. After Captain Haldane is killed on Peleliu, Stanley assumes command of K/3/5 and leads it through the conclusion of Peleliu and into mid-May during the assault on Okinawa. Stanley contracts malaria, however, and is evacuated after collapsing in the command post. He is missed by the men.