Working with the ground U. S. forces were the aviators of Air Solomons: New Zealand fighters, Army Air Force bombers, and the 1st and 2d Marine Aircraft Wings. As early as 15 August fighter planes from VMF-214 (the famous Black Sheep squadron) had strafed the Kahili airfield at the southern end of Bougainville. Now, in October, there were repeated strikes against the Japanese planes at other Bougainville airfields.
At sea, Halsey had designated Rear Admiral Theodore S. Wilkinson as commander of Task Force 31. Under him were Rear Admiral Frederick C. Sherman with the carriers (TF 38) and Rear Admiral Aaron S. “Tip” Merrill with the cruisers and destroyers (TF 39). Their job was to soften up the defenders before the landing and to safeguard the Marine-held beachhead.
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3d Marine Division
With Japan’s initial conquests spread over vast reaches of the Pacific, it quickly became obvious that additional Marine divisions were sorely needed. Accordingly, a letter from the Commandant on 29 August 1942 authorized the formation of the 3d Marine Division.
There was the 3d Marines, which had been activated first on 20 December 1916 at Santo Domingo in the Dominican Republic. Deactivated in August 1922, the regiment was again brought to life on 16 June 1942 at Camp Lejeune, North Carolina, and strengthened by boots from Parris Island. Its commander, Colonel Oscar R. Cauldwell, soon led to it to Samoa, arriving there in September 1942. Intensive training in jungle tactics and practice landings took place there. Then, in March 1943, it received a substantial number of reinforcing units and became a full-fledged regimental combat team, beefing up its strength to 5,600. Finally, in May 1943, it sailed for New Zealand, where the 3d Marine Division would come together.
Also with World War I roots, the 9th Marines was born 20 November 1917 at Quantico, Virginia, and was sent to Cuba. From there it moved to Texas, before being deactivated at the Philadelphia Navy Yard in April 1919. Reactivated on 12 February 1942 at Camp Elliott, California, under Colonel Lemuel C. Shepherd, Jr., it underwent training at the new Camp Pendleton. Similarly reinforced, by 1 January 1943 it was ready as a regimental combat team with 5,500 men. Movement overseas brought it to New Zealand on 5 February 1943.
The third infantry regiment that would make up the division was the 21st Marines. It was formed from a cadre of well-trained men from the 6th Marines, who had just returned from duty in Iceland. Arriving at Camp Lejeune on 15 July 1942, the cadre was augmented by boots from Parris Island and officers from Quantico. Colonel Daniel E. Campbell assumed command and the training began. Moving to join the other elements, the regiment arrived in New Zealand 11 March 1943.
The reinforcing of the infantry regiments to make them into self-sustaining regimental combat teams drew heavily on their two complementary regiments: the 12th Marines and the 19th Marines. The 12th Marines was a salty old unit, led by Brigadier General Smedley D. Butler in China in the 1920s. It’s antecedent was a small provisional contingent sent to protect American interests in China and designated the 12th Regiment (infantry), 4 October 1927. The 12th was reactivated at Camp Elliott on 1 September 1942 for World War II as an artillery regiment under command of Colonel John B. Wilson. Concluding its training, the regiment arrived in New Zealand on 11 March 1943.
The 19th Marines was different. It was made up of Seabees, engineers, bakers, piledrivers, pioneers, paving specialists, and many old timers from the 25th Naval Construction Battalion at the U.S. Naval Advance Base, Port Hueneme, California. It, too, was formed at Camp Elliott and its birthday was 16 September 1942. This was the regiment with pontoons for bridges, power plants, photographic darkrooms, bulldozers, excavators, needles, thread, and water purification machinery. No landing force would dare take an island without them. Colonel Robert M. Montague took command of the unit in New Zealand on 11 March 1943.