Original sentence: At the the Tokyo War Crime Tribunal in 1946, Okada Keisuke testified that Zhang was murdered because the Japanese were infuriated by his failure to stop Chiang's army, which was backed by Moscow, Tokyo's strategic rival.Zhang was followed by the eldest son of his official wife, Zhang Xueliang
Edited sentence: At the the Tokyo War Crimes Tribunal in 1946, Okada Keisuke testified that Zhang was murdered because the Guandong army was infuriated by his failure to stop Chiang's army, which was backed by Moscow, then Tokyo's strategic rival.Zhang was succeded by the eldest son of his official wife, Zhang Xueliang