Order of Battle

8 December 1941

Axis - Empire of Japan
25th Army (Lieutenant-General Yamashita Tomoyuki) (Nb: Following convention, Japanese names here are given surname first followed by given name)
5th Division (Lieutenant-General Matsui Takuro)

• 9th Infantry Brigade (Major-General Kawamura Saburo)
  • 11th Infantry Regiment (Colonel Watanabe Tsunahiko)
  • 41st Infantry Regiment (Colonel Okabe Kanichi)
• 21st Infantry Brigade (Major-General Sugiura Eikichi)
  • 21st Infantry Regiment (Colonel Harada Noriyoshi)
  • 42nd Infantry Regiment (Colonel Ando Tadao)

18th Division (Lieutenant-General Mutaguchi Renya)

• 23rd Infantry Brigade (Major-General Takumi Hiroshi)
  • 55th Infantry Regiment (Colonel Koba Hiroshi)
  • 56th Infantry Regiment (Colonel Nasu Yoshiyo)
• 35th Infantry Brigade (Major-General Kawaguchi Kiyotake)

Imperial Guards Division (Lieutenant-General Nishimura Takuma)

• 3rd Guards Regiment
• 4th Guards Regiment
• 5th Guards Regiment

3rd Tank Group

• 1st Tank Regiment (Colonel Mukaida)
  • 31 Type 97 Chi-Ha
  • 17 Type 95 Ha-Go
• 6th Tank Regiment (Colonel Kawamura)
  • 25 Type 97 Chi-Ha
  • 12 Type 95 Ha-Go
• 14th Tank Regiment (Colonel Kita)
  • 45 Type 95 Ha-Go

1st Independent Anti-Tank Battalion
Eight independent anti-tank companies
3rd Independent Mountain Artillery Regiment
3rd Heavy Field Artillery Regiment
18th Heavy Field Artillery Regiment (Lieutenant Colonel Takasu Katsutoshi)
21st Heavy Field Artillery Battalion
3rd Trench Mortar Battalion
5th Trench Mortar Battalion
14th Independent Mortar Battalion
17th Field Air Defence Units (four field anti-aircraft battalions)
Three independent field anti-aircraft companies
1st Balloon Company
4th Engineer Regiment
15th Engineer Regiment (Lieutenant Colonel Yokoyama Yosuke)
23rd Engineer Regiment
5th Independent Heavy Bridging Company
21st Bridging Material Company
22nd Bridging Material Company
27th Bridging Material Company
10th River Crossing Material Company
15th River Crossing Material Company
21st River Crossing Company
2nd Field Military Police Unit
2nd Railway Unit (two railway regiments, one railway material depot, two railway station office units and two special railway operating units)
25th Army Signal Unit (one telegraph regiment, one independent wire company, three independent wireless platoons and five stationary wireless units)

Lines of Communication Troops
Four LOC sector units
Eight independent motor transport battalions
Twelve independent motor transport companies
Two horse transport units
Ten land service companies
Five construction service companies
Survey, water, road, construction, ordanance and medical units

Allies - Armies of the Commonwealth of Nations
Malaya Command (Lieutenant-General Arthur Ernest Percival)

• ​III Indian Corps (Lieutenant-General Sir Lewis Heath)
  • 9th Indian Division (Major-General Arthur Edward Barstow)
    

• 8th Indian Infantry Brigade (Brigadier-General Berthold Wells Key)
  • ​2/10th Baluch Regiment (Lieutenant Colonel John Griffeth Frith)
    
  • 2/12th Frontier Force Regiment (Lieutenant Colonel Arthur Edward Cumming)
    
  • 1/13th Frontier Force Rifles (Lieutenant Colonel Clarence Gilbert)
  • 3/17th Dogra Regiment (Lieutenant Colonel George Allen Preston)
  • 21st Mountain Battery (Major John Bertram Sopper)
• 22nd Indian Infantry Brigade (Brigadier-General Gordon Whistler Arnaud Painter)
  • ​5/11th Sikh Regiment (Lieutenant Colonel John Henry Devereux Parkin
    
  • 2/18th Royal Garhwal Rifles (Lieutenant Colonel Guy Edward Ross Stewart Hartigan MC)
  • 5th Field Regiment (Lieutenant Colonel Edward Willima Francis Jephson)​