Order of battle for the Japanese invasion of French Indochina

The Indochina Expedition order of battle in World War II Southeast Asia, Vichy Indochina versus Japan, 1940 and the Sino-Japanese Air War, from 1937–1945:

Japan
5th Division - Lt. Gen. Akihito Nakamura [1]
 * 9th Infantry Brigade
 * 11th Infantry Regiment
 * 41st Infantry Regiment
 * 21st Infantry Brigade
 * 21st Infantry Regiment
 * 42nd Infantry Regiment
 * 5th Mountain Artillery Regiment
 * 5th Cavalry Regiment
 * 5th Engineer Regiment
 * 5th Transport Regiment

Indochina Expeditionary Army - Major Gen. Takuma Nishimura [1]
 * Indochina Expeditionary Infantry Group - Major Gen. Takeshi Sakurada
 * 2nd Imperial Guards Infantry Regiment - Col. Kunio Osonoe
 * Indochina Expeditionary Tank Unit (14th Tank Regiment)
 * Indochina Expeditionary AA Gun Unit
 * Signal Unit and others

IJAAF[4]
 * 1st Hikodan Headquarters
 * 59th Sentai, the
 * 90th Sentai and some
 * ground service units
 * 3rd Hikoshidan Headquarters
 * 18th I F Chutai
 * 60th Sentai
 * ground service units

Imperial Japanese Navy

2nd Fleet
 * DesRon 3
 * CL Sendai
 * DesDivs 12 and 20 with DD Nenohi

IJN airforce: [4]
 * Carrier Hiryū
 * Fighter daitai - Mitsubishi A5M
 * Bomber daitai - Aichi D1A2
 * Attack daitai - Yokosuka B4Y1
 * Seaplane tender Kamikawa Maru
 * 4 Type 94 Kawanishi E7K2 “Alf” reconnaissance float biplanes
 * 8 Type 95 Nakajima E8N2 “Dave” reconnaissance float biplanes

Japanese warships and transports carrying Expeditionary Force lying off Haiphong in the Gulf of Tonkin.

Vichy France[3]
Hanoi - Lt. Gen. Maurice Martin

Haiphong
 * shore defenses

Lang Son sector
 * 2nd Brigade - General Mennerat
 * five battalions of infantry:
 * I/3rd Regiment Tirailleurs Tonkinois (RTT
 * II/5th Regiment Etrangere d'Infanterie (REI)
 * I/9th Regiment d'Infanterie Coloniale (RIC)
 * a group of tanks,
 * a group of 75 mm artillery
 * a battery of 155 mm artillery
 * a group of 75 mm artillery
 * a battery of 155 mm artillery

That Khe - 1 company of II/3rd Regiment Tirailleurs Tonkinois (RTT)

Nam Quam - 2 companies of II/3rd Regiment d'Infanterie Coloniale (RIC)

Chima - 1 Platoon of a company of II/3rd Regiment Tirailleurs Tonkinois (RTT)

Loc Binh - bulk of a company of II/3rd Regiment Tirailleurs Tonkinois (RTT)

Na Dzuong - elements of 9th Regiment d'Infanterie Coloniale (RIC)

All told, about 5000 troops representing elements of 3rd Regiment Tirailleurs Tonkinois, 9th Regiment d'Infanterie Coloniale, and 5th Regiment Etrangere d'Infanterie.

Reserves:
 * IV/3rd Regiment Tirailleurs Tonkinois (RTT) - to counterattack toward Dong Dang
 * "fresh battalions" - Lang Giai and Lang Nac barring the route from Lang Son to Hanoi