MAAG

Military Assistance Advisory Group (MAAG) is a designation for United States military advisers sent to other countries to assist in the training of conventional armed forces and facilitate military aid. Although numerous MAAGs operated around the world throughout the 1940s–1970s, the most famous MAAGs were those active in Southeast Asia before and during the Vietnam War. Typically, the personnel of MAAGs were considered to be technical staff attached to, and enjoying the privileges of, the US diplomatic mission in a country. Although the term is not as widespread as it once was, the functions performed by MAAGs continue to be performed by successor organizations attached to embassies, often called United States Military Groups (USMILGP or MILGRP). The term MAAG may still occasionally be used for such organizations helping promote military partnerships with several Latin American countries such as Peru and the Dominican Republic as well as in African countries such as Liberia.

In September 1950, US President Harry Truman sent the Military Assistance Advisory Group (MAAG) to Vietnam to assist the French in the First Indochina War. The President claimed they were not sent as combat troops, but to supervise the use of $10 million worth of US military equipment to support the French in their effort to fight the Viet Minh forces. By 1953, aid increased dramatically to $350 million to replace old military equipment owned by the French.

The French Army however, was reluctant to take U.S. advice, and would not allow the Vietnamese army to be trained to use the new equipment, because it went against French policy. They were supposed to not only defeat enemy forces but to solidify themselves as a colonial power, and they could not do this with a Vietnamese Army. French commanders were so reluctant to accept advice that would weaken their time-honored colonial role that they got in the way of the various attempts by the MAAG to observe where the equipment was being sent and how it was being used. Eventually the French decided to cooperate, but at that point it was too late.

...
Wikipedia