The Japanese and Manchukuoan order of battle for Operation Nekka was: Kwantung Army Jehol Operation Force - Field Marshal Baron Nobuyoshi Muto, Manchukuo Imperial Army Manchukuoan Force 42,000 men[1] - Zhang Haipeng[2] Manchukuoan units with the Japanese Northern Column 10,000 men[1] Manchukuoan units with the Japanese Eastern Column 15,000 men[1] 5th Army Group - Commander in chief Tang Yulin (governor of Rehe)[1] 6th Army Group - Zhang Zuoxiang (former governor of Jilin)* 4th Army Group - Wan Fulin* (former chairman of Heilongjiang)