Complex sentence: In a force of more than two hundred men, the officers mainly Hawaiian and the chiefs mostly white, Chang was the only Chinese member of the force and was assigned to patrol such Chinatown areas called "Blood Town" and "Hell's Half Acre".
Split into simpler sentences: In a force of more than two hundred men, the officers mainly Hawaiian and the chiefs mostly white, Chang was the only Chinese member of the force. He was assigned to patrol Chinatown areas referred to as "Blood Town" and "Hell's Half Acre".