Guadalcanal Order of Battle - 7 August 1942 and 9 February 1943.

United States Marines

1st Marine Division
- 1st Marine Regiment
- 5th Marine Regiment
- 7th Marine Regiment
- 11th Marine Regiment
- 1st Amphibian Tractor Battalion
- 1st Aviation Engineer Battalion
- 1st Parachute Battalion²
- 1st Pioneer Battalion
- 1st Raider Battalion
- 1st Special Weapons Battalion
- 1st Tank Battalion

2nd Marine Division
- 2nd Marine Regiment
- 6th Marine Regiment
- 8th Marine Regiment
- 10th Marine Regiment
- 2nd Amphibian Tractor Battalion
- 3rd Defense Battalion
- 9th Defense Battalion
- 2nd Raider Battalion
- 2nd Special Weapons Battalion
- 2nd Tank Battalion

Japanese Seventeenth Army

2nd Infantry Division (Sendai Division)
- 4th Infantry Regiment
- 16th Infantry Regiment
- 29th Infantry Regiment
- 2nd Artillery Regiment
- 2nd Engineer Battalion

38th Infantry Division

228th Infantry Regiment
229th Infantry Regiment
230th Infantry Regiment
38th Mountain Gun Regiment
38th Engineer Battalion

35th Brigade

124th Infantry Regiment
Kitao Battalion/Ichiki Detachment
4th Artillery Regiment
10th Mountain Gun Battalion
20th Mountain Gun Battalion

28th Infantry Regiment
11th Construction Unit
13th Construction Unit

United States Army

25th Infantry Division

27th Infantry Regiment
35th Infantry Regiment
161st Infantry Regiment
(Washington National Guard)
8th Field Artillery Battalion
64th Field Artillery Battalion
89th Field Artillery Battalion
90th Field Artillery Battalion
65th Engineer Combat Battalion

Americal Division

132nd Infantry Regiment
(Illinois National Guard)
164th Infantry Regiment
(North Dakota National Guard)
182nd Infantry Regiment
(Massachusetts National Guard)
221st Field Artillery Battalion
245th Field Artillery Battalion
246th Field Artillery Battalion
247th Field Artillery Battalion
57th Engineer Combat Battalion
147th Infantry Regiment (Separate)
(Ohio National Guard)
97th Field Artillery Battalion
214th Coast Artillery Regiment
244th Coast Artillery Regiment