The order of battle for Operation Chahar, in the history of the Second Sino-Japanese War (1937–1945), was:
Japan
Peiping Railway Garrison Force, Nan-kou Front - Gen. Kiyoshi Katsuki [1] [4]
5th Division – Gen. Seishiro Itagaki[4]9th Infantry Brigade11th Infantry Regiment41st Infantry Regiment21st Infantry Brigade21st Infantry Regiment42nd Infantry Regiment5th Mountain Artillery Regiment5th Cavalry Regiment5th Engineer Regiment5th Transport Regiment4th Tank Battalion from Sakai Brigade -11th Independent Mixed Brigade- Gen. Shigiyasu Suzuki11th Independent Infantry Regiment12th Independent Infantry Regiment11th Independent Cavalry Company11th Independent Field Artillery Regiment12th Independent Mountain Gun Regiment11th Independent Engineer Company11th Independent Transport CompanyTank Unit – from China Stationed Tank UnitKwangtung Army [1] [4]
Manchukuo 5th District Army - General Shigero Fujii [7]Jehol DetachmentChahar Expeditionary Force - Lt. General Hideki Tojo[5], Kalgan Front1st Independent Mixed Brigade (Sakai Brigade)- Lt. Gen Sakai Koji)4th Tank Battalion - ? [6]12 x Type 89 Medium Tanks13 x Type 95 Light Tanks12 x Type 94 Tankettes4 x Armored Engineer Vehicles1st Independent Infantry Regiment1st Independent Artillery Battalion1st Independent Engineer Company2nd Mixed Brigade - Major Gen Masaki Honda[5](from 1st Division) Kwangtung Army)1st Infantry Regiment - Col Sogawa[5]3rd Infantry Regiment - Col Yuasa[5]3rd Battalion/57th Infantry Regiment2nd Co./1st Cavalry Regiment4th Battalion/1st Field Artillery Regiment1st Co./1st Engineer RegimentOhizumi Detachment (大泉支隊) - ? [7]one battalion / 4th Infantry Regiment / 2nd Division15th Mixed Brigade – Major Gen. Seiichiro Shinohara (from 2nd Division, Kwangtung Army)16th Infantry Regiment - Col Goto [5]30th Infantry Regiment - Col Ikagura [5]2nd Cavalry Regiment - Lt Col Honda[5]2nd Field Artillery Regiment - Col Takahashi[5]2nd Engineer Regiment - Col Ito[5]2nd Transport RegimentMongolian Army – Prince Teh Wang, Pao Yueh-ching [2]1st Cavalry Division2nd Cavalry Division3rd Cavalry Division4th Cavalry Division5th Cavalry Division6th Cavalry Division7th Cavalry Division8th Cavalry Division2nd Air Group Operation Quhar - ? [3]12th Air Regiment 2 bomber squadrons Ki-215th Air Regiment 4 scout plane squadrons Ki-4's and Ki.15's2nd Battalion / 16th Air Regiment Ki-102 fighter squadrons, 4 scout plane squadrons, 2 bomber squadrons,
Airforce:'
Rinji Hikodan[3]1st Hiko Daitai/16th Hiko Rentai [Kawasaki Ki-10]1st Chutai2nd ChutaiLight bomber daitai/16th Hiko Rentai [Type 88 reconnaissance aircraft]2nd Hiko Daitai [Kawasaki Ki-10]1st Chutai2nd Chutai8th Hiko Daitai[Kawasaki Ki-10]1st Chutai2nd Chutai12th Hiko Rentai [Mitsubishi Ki-2 Type 94 observation aircraft]Dokuritsu Hiko Dai 3 Chutai (Independent Company). Army Tipe 93 Heavy Bomber Mitsubishi Ki-1. 9 AircraftIndependent 4th Dokuritsu Hiko Chutai [Reconnaissance squadron ]Independent 6th Dokuritsu Hiko Chutai [Reconnaissance squadron ]Independent 9th Dokuritsu Hiko Chutai [Kawasaki Ki-10]Notes:
1. Kwangtung Army and Chahar Expeditionary Force were under the command of Central Supreme Command but were not under unified command on the battlefield in this campaign.
2. 11th Independent Mixed Brigade was subordinated to Kwangtung Army, At the end of July it was attached to Peiping Railway Garrison Force. In early September, it reverted to the Chahar Expeditionary Force.
3. 2nd and 15th Mixed Brigades were detachments from Divisions of the Kwangtung Army.
