Nor did MacArthur lose any time at making up his mind. That very day, 10 July, he sent his first request to the Joint Chiefs of Staff for a Marine division.
As the conference ended, Shepherd found the UN supreme commander “enthusiastic” about the prospect of employing again the Marine outfit that had been his reliance seven years before in the New Britain operation. He planned to stabilize the front in Korea as soon as possible, he said, as a prelude to the landing in the NKPA rear which he believed would be decisive.[24]
[24] CG FMFPac memo to CMC, 11 Jul 50.
America’s Force-in-Readiness
Long before the New Britain landing, Cates and Shepherd had learned from first-hand experience as junior officers how decisive a force-in-readiness can be. The lieutenant from Tennessee and the lieutenant from Virginia took part in June 1918 with the Marines who stopped the Germans by counterattacking at Belleau Wood. In terms of human tonnage, two Marine regiments did not cut much of a figure in the American Expeditionary Force. What counted was the readiness of the Marines and a few outfits of U. S. Army regulars at a time when most of the American divisions had not yet finished training.
More than three decades later, as CMC and CG FMFPac, both Marine generals were firm advocates of the force-in-readiness concept as a basic mission of the Marine Corps. It was a mission that had evolved from practice rather than theory. During the half century since the Spanish-American War, there had been only two years when U. S. Marines were not on combat duty somewhere. It had long been a tradition that the Marines, as transitory naval forces, might land on foreign soil without the implication of hostilities usually associated with invasion. This principle was invoked, along with a liberal interpretation of the Monroe Doctrine, by the State Department from 1906 to 1932 in the Caribbean and Central America. As a means of supervising unstable governments in sensitive strategic areas, Marines were sent to Cuba, Mexico, Haiti, the Dominican Republic, Nicaragua, and China for long periods of occupation.[25]
[25] For a detailed discussion of this subject, see US Dept of State, Office of the Solicitor, Right to Protect Citizens in Foreign Countries by Landing Forces, 3d rev. ed. with sup. app. to 1933 (Washington, 1934). (State Dept Pub. No. 538.)
U. S. Marines were not only web-footed infantry during these overseas operations; they also distinguished themselves as scouts, cannoneers, constabulary, engineers, and horse marines. As modern warfare grew more complex, however, the time came when the Leathernecks could no longer sail on a few hours’ notice as a “gangplank expeditionary force” made up of men detailed from the nearest posts and stations. No longer could such light weapons as machine guns, mortars, and mountain howitzers serve as the only armament necessary for seizing a beachhead.
The Fleet Marine Force evolved in 1933, therefore, to fill the need for a corps of highly-trained amphibious specialists capable of carrying out a major ship-to-shore assault against modern defensive weapons. New landing craft as well as new landing tactics and techniques were developed during the next ten years, and the reputation of the Marine Corps as a force-in-readiness was upheld in the amphibious operations of World War II.
During these three eventful decades of Marine development, General Cates and General Shepherd had participated in all the stages while ascending the ladder of command. Thus in the summer of 1950, they were eminently qualified for leadership in the task of building the 1st Marine Division up to war strength for the amphibious operation which General MacArthur hoped to launch on 15 September.