(1) The United States had probably made a serious mistake in agreeing with its allies to allow French power to be restored in Indochina. As a colonial power, France had done little to develop indigenous civilian and military leaders and civil servants in preparation for the countries' eventual independence.
(2) Indochina was of only secondary strategic importance to the United States. The economic and military value of Vietnam, the most important state in the region, was not impressive. Politically and socially Vietnam was obviously entering an unstable period with uncertain consequences. In any event, it did not warrant the commitment of US forces to its defense.
(3) General war planning by the U.S. Joint Chiefs of Staff (JCS) envisioned a strategic defense in the Pacific, drawing the U.S. forward defense line to include Japan, South Korea, and the offshore island chain (Okinawa-Taiwan-the Philippines). But in Southeast Asia the line was drawn through the Isthmus of Kra on the mainland, excluding all of Indochina and most of Thailand. Thus, the Straits of Malacca and populous, endowed Indonesia were considered to be the prime strategic targets of the region.
(4) Militarily the region in general and Vietnam in particular would be an extremely difficult operational area, especially for U.S. forces. Unlike the relatively narrow Korean peninsula, Vietnam presented very long land and coastal borders that would be almost impossible to seal against infiltration and difficult to defend against overt military aggression. Much of the region was covered with dense jungle and much was mountainous. Weather, terrain and geographical factors combined to present formidable obstacles for military operations and logistic support.
(5) Politically and psychologically the United States, if it were to become involved, would have to operate under severe disadvantages, for it would inherit the taint of European colonialism. The United States should not become involved in the area beyond providing materiel military aid.
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