Sorry for the delay.
Cactus-You were looking at the
103rd Infantry Division, it was known as the Cactus Division. You wanted the 103rd Infantry Regiment of the 43rd Infantry Division. Regiments were sub-units of divisions. US regiments were 3-4000 men and infantry divisons 14-16000.
103rd Infantry Regiment (IR) Inducted Federal service Portland Maine, assigned to 43rd Infantry Division (ID). Stationed at various post in US then departed San Francisco P/E 30 Sep 42, arrived New Zealand 25 Oct 42 then to Noumea New Caledonia 7 Nov 42, departing 13 Feb 43. Landed Guadalcanal 17 Feb 43 and Russell Island 21 Feb 43. Assualted New Georgia 30 Jun 43 and 3rd Battalion landed at Laiana New Guinea 14 Jul 43. Reg. returned to New Zealand 17 Feb 44 then to Aitape, New Guinea 22 Jul 44. Departed 26 Dec 44 and assualted Lingayen Gulf, Luzon, Philipines 9 Jan 45 (attached to 1st Cavalry Division 8-12 Mar 45). Arrived Japan for occupation duty 13 Sep 45. Returned to San Fran. 9 Oct 45. Inactivated Camp Stoneman, Ca 1 Nov 45.
More info.
43rd Infantry Division made up of the 103rd, 169th and 172nd Infantry Regiments, plus supporting units
Commanders
MGen Morris B Payne: Feb 41
MGen John H. Hester Aug 41
MGen Leonard F Wing Aug 43
KIA 1128 WIA 4887 Died of Wounds 278
Superior Commands
South Pacific Area Command 22 Oct 42 to 19 Aug 44
6th US Army 20 Aug 44 to 1 Oct 44
8th US Army 2 Oct 44 to 16 Feb 45
6th US Army 1 Feb 45 to 14 Aug 45
8th US Army 15 Aug 45
Divisional Patch
103rd landed Russel Island without opposition.
Other 2 regiments of the 43rdID landed unopposed Rendova Island 30 Jun 43 with 103rd joining 4 Jul 43.
43rd ID moved to New Georgia 3-6 Jul 43 and attacked Munda Trail, reaching coast at Laiana by 13 Jul 43. All three regiments fought up Munda Trail with 103 and 169 IRs reaching Munda airfield 1 Aug 43, taking the field 5 Aug 43 after heavy fighting. Heavy combat on rest of Island until 15 Aug 43.
Division moved to various islands inthe Solomons chain, performing garrions duties then moved in echelon to New Zealand by 26 Mar 44. Back to New Guinea by 4 Aug 44, assuming garrison duties.. Relieved by Australian 6th Division 10 Oct 44.
Assaulted San Fabian area of Luzon Island, Philipines 9 Jan 45. Several important hills taken with the 103rd taking crest of hill 602* 21 Jan 45. Various other hills taken with 103rd in reserve, with entire 43rd ID going into reserve 17 Feb 45.
43rd ID attacked Fort Stotsenburg area 28 Feb 45 and relieved the 40th ID in the Zambales Mountaiins 2 Mar 45. The 103rd seized Bench Mark 7 (?), the last Japanese strongpoint west of the Morong River Valley 16 Mar 45. Hill 1200 fell to the 172nd IR, allowing the Shimbu Line to be turned and the 103rd then secured Santa Maria Valley 1 Apr 45.
43rd ID attacked toware Ipo 6 May 45 and after heavy combat seized Ipo Dam intact 14-17 May 45. Mopping up area took until 2 Jun 45, then 43rd ID moved to fight in the Wawa Wawa-Mt. Haponang area 26-60 Jun 45. 1 Jul 45, the division moved to Cabanatuan and trained until end of war.
My info came from
Order of Battle, US Army World War II, by Shelby Stanton
Here are some web pages:
43rd Infantry Division -- Winged Victory
43rd Infantry Division (United States - Wikipedia, the free encyclopedia)
*Hills were numbered by their height in meters above sea level.