Another factor was the changing nature of the Pacific war. In the desperate early days of 1942 there was a potential need for commando-type units that could strike deep in enemy territory and keep the Japanese off balance while the United States caught its breath. However, there had been only one such operation and it had not been a complete success. The development of the amphibian tractor and improved fire support also had removed the need for the light assault units envisioned by Holland Smith at the beginning of the war. Since then the raiders generally had performed the same missions as any infantry battalion. Sometimes this meant that their training and talent were wasted, as happened on Bougainville and Pavuvu. In other cases, the quick but lightly armed raiders suffered because they lacked the firepower of a line outfit. The failure at Bairoko could be partially traced to that fact. With many large-scale amphibious assaults to come against well-defended islands, there was no foreseeable requirement for the particular strengths of the raiders.
Weary members of the 2d Raider Battalion catch a few moments of rest in the miserable, unrelieved wetness that was the hallmark that all troops experienced as soon as they advanced inland from the beach in the Bougainville operation.
Department of Defense Photo (USMC) 70777
Department of Defense Photo (USMC) 59036
Marine raider Pvt Roy Grier examines the Nambu pistol he liberated from an enemy officer of the Special Landing Force in an encounter on Bairoko.
Finally, there was institutional opposition to the existence of an elite force within the already elite Corps. The personnel and equipment priorities given to the first two raider battalions at a time of general scarcity had further fueled enmity toward these units. Now that the war was progressing toward victory, there was less interest on the part of outsiders in meddling in the details of Marine Corps organization. Just as important, two senior officers who had keenly felt pain at the birth of the raiders—Vandegrift and Thomas—were now coming into positions where they could do something about it. On 1 January 1944 Vandegrift became Commandant of the Marine Corps and he made Thomas the Director of Plans and Policies.
In mid-December 1943 Thomas’ predecessor at HQMC had already set the wheels in motion to disband the raiders and the parachutists. Among the reasons cited in his study was that such “handpicked outfits ... are detrimental to morale of other troops.” A week later, a Marine officer on the Chief of Naval Operation’s staff forwarded a memorandum through the Navy chain of command noting that the Corps “feels that any operation so far carried out by raiders could have been performed equally well by a standard organization specially trained for that specific mission.” The CNO concurred in the suggestion to disband the special units, and Vandegrift gladly promulgated the change on 8 January 1944. This gave Thomas everything he wanted—fresh manpower from the deleted units and their stateside training establishments, as well as simplified supply requirements due to increased uniformity.
The raiders did not entirely disappear. On 1 February the 1st Raider Regiment was redesignated the 4th Marines, thus assuming the lineage of the regiment that had garrisoned Shanghai in the interwar years and fought so gallantly on Bataan and Corrigedor. The 1st, 3d, and 4th Raider Battalions became respectively the 1st, 3d, and 2d Battalions of the 4th Marines. The 2d Raider Battalion filled out the regimental weapons company. Personnel in the Raider Training Center transferred to the newly formed 5th Marine Division. Leavened with new men, the 4th Marines went on to earn additional distinctions in the assaults on Guam and Okinawa. At the close of the war, the regiment joined the occupation forces in Japan and participated in the release from POW compounds of the remaining members of the old 4th Marines.