Complex sentence: The march was characterized by wide-ranging physical abuse and murder, and resulted in very high fatalities inflicted upon prisoners and civilians alike by the Japanese Army, and was later judged by an Allied military commission to be a Japanese war crime.
Split into simpler sentences: The march was characterized by wide-ranging physical abuse and murder, and resulted in very high fatalities inflicted upon prisoners and civilians alike by the Japanese Army. It was later judged by an Allied military commission to be a Japanese war crime.