An extract on #marine
However, despite the original intent for Raiders to serve in a special operations capacity, most combat operations saw the Raiders employed as conventional infantry. This, combined with the resentment within the rest of the Marine Corps that the Raiders were an "elite force within an elite force", led to the eventual abandonment of the experiment.
Four Raider battalions served operationally but all were disbanded on 8 January 1944 when the Corps made the doctrinal decision that the Raiders had outlived their original mission. The changing nature of the war in the Pacific, with many large-scale amphibious assaults to come against well-defended islands, negated the requirements for small light units that could strike deep into enemy territory.
On 1 February 1944, the 1st Raider Regiment was redesignated the 4th Marine Regiment, thus assuming the lineage of the regiment that had garrisoned Shanghai in the interwar years and fought so gallantly on Bataan and Corregidor. The 1st, 3rd, and 4th Raider Battalions became respectively the 1st, 3rd, and 2nd Battalions of the 4th Marines. The 2nd 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.
In 2014, the Marine Special Operations Regiment, serving under the United States Marine Corps Forces Special Operations Command (MARSOC), was renamed the Marine Raider Regiment. This change was implemented to better show that modern Marine special operations forces trace their lineage and heritage back to the World War II Raiders. Individual marines of the Marine Raider Regiment are once again called "Marine Raiders".
One of the deficiencies of the Fleet Marine Force was a lack of fast transport ships that could keep up with a Naval fleet. Until fast attack transports entered the Navy, either the fleet would have to keep its speed down to the speed of the transport ships, or the fleet would have to split in two components; neither option was desirable. With the start of World War II in 1939, a group was formed to come up with a solution that could be rapidly implemented. The group found a large number of destroyers built for the First World War that were in the mothball fleet. These destroyers had four boilers and four smoke stacks and were fast enough to keep up with the fleet. The group discovered that by removing two boilers and smoke stacks room could be found to quarter a company of 130 Marines who would be landed by inflatable boats. These high speed transports were named APDs by the Navy. The APDs later had four Higgins boats attached to them.
In February 1941 one company ("A", "E" and "I") from each battalion of the recently formed 7th Marines were designated "Provisional Rubber Boat Companies" and participated in a Fleet Landing Exercise (FLEX-7) in 1941. After the exercise, General Holland Smith assigned the APDs and rubber boat function to the 1st Battalion 5th Marines.