L’occupation de l’Indochine française par le Japon entre juin 1940 et juillet 1941 constitue un événement-clé de l’histoire de la Seconde Guerre mondiale. Désirant sortir de son isolement diplomatique et du bourbier du conflit chinois, le Japon profite de la victoire allemande en juin 1940 pour occuper le nord de l’Indochine, arrimer la colonie française à son économie, imposer sa médiation dans le conflit franco-thaïlandais, puis occuper le sud de l’Indochine avant de se lancerdans ce la Guerre du Pacifique. Pourtant, son ennemi désigné est, traditionnellement, l’URSS. Les raisons de cet hybris sont à chercher dans sa volonté de détruire le statu quo imposé par les puissances occidentales en Asie orientale, ainsi que dans une crise interne insoluble qui le font choisir le camp des pays totalitaires. L’occupation du sud de l’Indochine en juillet 1941 est un point de non-retour. Cette crise où l’Indochine française a joué un rôle central, permet à l’historien de découvrir le mécanisme du processus de décision dans le Japon d’avant la Seconde Guerre mondiale. Les groupes dirigeants japonais ne connaissent pas de lutte entre des faucons et des colombes, mais la rivalité permanente de factions qui cherchent prendre la tête du mouvement expansionniste. Car si l’expansion fait consensus, la décision, tant de la direction que des moyens, est l’objet d’âpres luttes. C’est cependant à l’occasion de l’occupation de l’Indochine et à mesure que la Guerre du Pacifique se rapproche, qu’une synthèse se fait en haut de l’État par la constitution d’un groupe dirigeant composé de militaires et de bureaucrates favorisant une évolution totalitaire du régime, couplée à la construction d’un empire en Asie et dans le Pacifique. / The occupation of French Indochina by Japan from June 1940 to July 1941 constitutes a key event for World War II history. Eager to escape its diplomatic isolation and the quagmire of the war in China, Japan takes advantage of German victory in June 1940 to occupy Northern Indochina, to tie up the French colony to its economy, to impose its mediation in the French-Thai conflict, occupy the Southern part of Indochina and, then, to launch the Pacific War. However, its traditional foe was the USSR. The reasons of this hubris lie in its desire to destroy the status quo enforced by western powers in Eastern Asia, as well as in an insoluble internal crisis that made Japan choose the side of totalitarian countries. The occupation of Southern Indochina in 1941 is a point of no return. This crisis where French Indochina played a crucial part allows the historian to uncover the mechanism of the decision-making process in Japan before the Second World War. Japanese leading groups do not operate on a partition between hawks and doves, but on the constant rivalry of factions who would try to take the lead of the movement for expansion. If expansion is the object of a consensus among leaders, the decision of its direction and means is the causes of fierce conflicts. However, the occupation of Indochina and the approach of the Pacific War lead to a synthesis at the top of the State, by the composition of a leading group made of military and bureaucrats who promote the totalitarian evolution of the regime coupled with the building of an empire in Asia and in the Pacific.

This thesis examines the American Military Assistance Advisory Group (MAAG) sent to French Indochina, from 1950 to 1956, when the United States provided major monetary and material aid to the French in their war against the communist Viet Minh. MAAG observed French units in the field and monitored the flow of American materiel into the region. Relying upon primary research in the National Archives, the thesis departs from previous interpretations by showing that MAAG held generally positive assessments of France‟s performance in Indochina. The thesis also argues that MAAG personnel were more interested in getting material support to the French, than in how that material was used, to the point of making unrealistic assessments of French combat abilities. By connecting primary research with the greater history of Cold War American military assistance, the thesis contributes to the scholarship on American involvement in Vietnam.

The United States engagement in Vietnam began during the Second World War. With military bases established in China, the U.S. took part in fighting the Japanese troops in the Pacific theatre. When France surrendered to Nazi Germany in 1940, Japan would take over the French Indochina and the war would spread to Vietnam as well. In order to collect intelligence on Japanese targets, the Americans needed to operate secret services on the ground. After the Japanese coup de main in 1945, they would eventually partner with Ho Chi Minh and his organization Viet Minh. The Office of Strategic Services (OSS), the wartime predecessor of the CIA, provided intelligence training and equipment, while the Viet Minh would assist with valuable information on Japanese troops. To some extent, the OSS helped Ho Chi Minh and Viet Minh accede to power in Vietnam after the war.

This dissertation is a focused analysis of the origins, organization, training, politics, and combat capability of the Army of the Republic of Viet Nam (ARVN) from 1954 to 1963, the leading military instrument in the national counterinsurgency plan of the government of the Republic of Viet Nam (RVN). Other military and paramilitary forces that complemented the army in the ground war included the Viet Nam Marine Corps (VNMC), the Civil Guard (CG), the Self-Defense Corps (SDC) and the Civil Irregular Defense Groups (CIDG) which was composed mainly of the indigenous populations in the Central Highlands of South Vietnam. At sea and in the air, the Viet Nam Air Force (VNAF) and the Viet Nam Navy (VNN) provided additional layers of tactical, strategic and logistical support to the military and paramilitary forces. Together, these forces formed the Republic of Viet Nam Armed Forces (RVNAF) designed to counter the communist insurgency plaguing the RVN. This thesis argues the following. First, the origin of the ARVN was rooted in the French Indochina War (1946-1954). Second, the ARVN was an amalgamation of political and military forces born from a revolution that encompassed three overlapping wars: a war of independence between the Vietnamese and the French; a civil war between the Vietnamese of diverse social and political backgrounds; and a proxy war as global superpowers and regional powers backed their own Vietnamese allies who, in turn, exploited their foreign supporters for their own purposes. Lastly, the ARVN failed not because it was organized, equipped, and trained for conventional instead of counterinsurgency warfare. Rather, it failed to assess, adjust, and adapt its strategy and tactics quickly enough to meet the war’s changing circumstances. The ARVN’s slowness to react resulted from its own institutional weaknesses, military and political problems that were beyond its control, and the powerful and dangerous enemies it faced. The People’s Army of Viet Nam (PAVN) and the People’s Liberation Armed Forces (PLAF) were formidable adversaries. Not duplicated in any other post-colonial Third World country and led by an experienced and politically tested leadership, the Democratic Republic of Viet Nam (DRVN) and the National Front for the Liberation of Southern Viet Nam (NFLSVN) exploited RVN failures effectively. Hypothetically, there was no guarantee that had the US dispatched land forces into Cambodia and Laos or invaded North Vietnam that the DRVN and NFLSVN would have quit attacking the RVN. The French Far East Expeditionary Corps (FFEEC)’ occupation of the Red River Delta did not bring peace to Cochinchina, only a military stalemate between it and the Vietnamese Liberation Army (VLA). Worse yet, a US invasion potentially would have unnerved the People’s Republic of China (PRC) which might have sent the PLAF to fight the US in Vietnam as it had in Korea. Inevitably, such unilateral military action would certainly provoke fierce criticism and opposition amongst the American public at home and allies abroad. At best, the war’s expansion might have bought a little more time for the RVN but it could never guarantee South Vietnam’s survival. Ultimately, RVN’s seemingly endless political, military, and social problems had to be resolved by South Vietnam’s political leaders, military commanders, and people but only in the absence of constant PAVN and PLAF attempts to destroy whatever minimal progress RVN made politically, militarily, and socially. The RVN was plagued by many problems and the DRVN and NFLSVN, unquestionably, were amongst those problems.

This dissertation is a focused analysis of the origins, organization, training, politics, and combat capability of the Army of the Republic of Viet Nam (ARVN) from 1954 to 1963, the leading military instrument in the national counterinsurgency plan of the government of the Republic of Viet Nam (RVN). Other military and paramilitary forces that complemented the army in the ground war included the Viet Nam Marine Corps (VNMC), the Civil Guard (CG), the Self-Defense Corps (SDC) and the Civil Irregular Defense Groups (CIDG) which was composed mainly of the indigenous populations in the Central Highlands of South Vietnam. At sea and in the air, the Viet Nam Air Force (VNAF) and the Viet Nam Navy (VNN) provided additional layers of tactical, strategic and logistical support to the military and paramilitary forces. Together, these forces formed the Republic of Viet Nam Armed Forces (RVNAF) designed to counter the communist insurgency plaguing the RVN. This thesis argues the following. First, the origin of the ARVN was rooted in the French Indochina War (1946-1954). Second, the ARVN was an amalgamation of political and military forces born from a revolution that encompassed three overlapping wars: a war of independence between the Vietnamese and the French; a civil war between the Vietnamese of diverse social and political backgrounds; and a proxy war as global superpowers and regional powers backed their own Vietnamese allies who, in turn, exploited their foreign supporters for their own purposes. Lastly, the ARVN failed not because it was organized, equipped, and trained for conventional instead of counterinsurgency warfare. Rather, it failed to assess, adjust, and adapt its strategy and tactics quickly enough to meet the war’s changing circumstances. The ARVN’s slowness to react resulted from its own institutional weaknesses, military and political problems that were beyond its control, and the powerful and dangerous enemies it faced. The People’s Army of Viet Nam (PAVN) and the People’s Liberation Armed Forces (PLAF) were formidable adversaries. Not duplicated in any other post-colonial Third World country and led by an experienced and politically tested leadership, the Democratic Republic of Viet Nam (DRVN) and the National Front for the Liberation of Southern Viet Nam (NFLSVN) exploited RVN failures effectively. Hypothetically, there was no guarantee that had the US dispatched land forces into Cambodia and Laos or invaded North Vietnam that the DRVN and NFLSVN would have quit attacking the RVN. The French Far East Expeditionary Corps (FFEEC)’ occupation of the Red River Delta did not bring peace to Cochinchina, only a military stalemate between it and the Vietnamese Liberation Army (VLA). Worse yet, a US invasion potentially would have unnerved the People’s Republic of China (PRC) which might have sent the PLAF to fight the US in Vietnam as it had in Korea. Inevitably, such unilateral military action would certainly provoke fierce criticism and opposition amongst the American public at home and allies abroad. At best, the war’s expansion might have bought a little more time for the RVN but it could never guarantee South Vietnam’s survival. Ultimately, RVN’s seemingly endless political, military, and social problems had to be resolved by South Vietnam’s political leaders, military commanders, and people but only in the absence of constant PAVN and PLAF attempts to destroy whatever minimal progress RVN made politically, militarily, and socially. The RVN was plagued by many problems and the DRVN and NFLSVN, unquestionably, were amongst those problems.

This dissertation is a focused analysis of the origins, organization, training, politics, and combat capability of the Army of the Republic of Viet Nam (ARVN) from 1954 to 1963, the leading military instrument in the national counterinsurgency plan of the government of the Republic of Viet Nam (RVN). Other military and paramilitary forces that complemented the army in the ground war included the Viet Nam Marine Corps (VNMC), the Civil Guard (CG), the Self-Defense Corps (SDC) and the Civil Irregular Defense Groups (CIDG) which was composed mainly of the indigenous populations in the Central Highlands of South Vietnam. At sea and in the air, the Viet Nam Air Force (VNAF) and the Viet Nam Navy (VNN) provided additional layers of tactical, strategic and logistical support to the military and paramilitary forces. Together, these forces formed the Republic of Viet Nam Armed Forces (RVNAF) designed to counter the communist insurgency plaguing the RVN. This thesis argues the following. First, the origin of the ARVN was rooted in the French Indochina War (1946-1954). Second, the ARVN was an amalgamation of political and military forces born from a revolution that encompassed three overlapping wars: a war of independence between the Vietnamese and the French; a civil war between the Vietnamese of diverse social and political backgrounds; and a proxy war as global superpowers and regional powers backed their own Vietnamese allies who, in turn, exploited their foreign supporters for their own purposes. Lastly, the ARVN failed not because it was organized, equipped, and trained for conventional instead of counterinsurgency warfare. Rather, it failed to assess, adjust, and adapt its strategy and tactics quickly enough to meet the war’s changing circumstances. The ARVN’s slowness to react resulted from its own institutional weaknesses, military and political problems that were beyond its control, and the powerful and dangerous enemies it faced. The People’s Army of Viet Nam (PAVN) and the People’s Liberation Armed Forces (PLAF) were formidable adversaries. Not duplicated in any other post-colonial Third World country and led by an experienced and politically tested leadership, the Democratic Republic of Viet Nam (DRVN) and the National Front for the Liberation of Southern Viet Nam (NFLSVN) exploited RVN failures effectively. Hypothetically, there was no guarantee that had the US dispatched land forces into Cambodia and Laos or invaded North Vietnam that the DRVN and NFLSVN would have quit attacking the RVN. The French Far East Expeditionary Corps (FFEEC)’ occupation of the Red River Delta did not bring peace to Cochinchina, only a military stalemate between it and the Vietnamese Liberation Army (VLA). Worse yet, a US invasion potentially would have unnerved the People’s Republic of China (PRC) which might have sent the PLAF to fight the US in Vietnam as it had in Korea. Inevitably, such unilateral military action would certainly provoke fierce criticism and opposition amongst the American public at home and allies abroad. At best, the war’s expansion might have bought a little more time for the RVN but it could never guarantee South Vietnam’s survival. Ultimately, RVN’s seemingly endless political, military, and social problems had to be resolved by South Vietnam’s political leaders, military commanders, and people but only in the absence of constant PAVN and PLAF attempts to destroy whatever minimal progress RVN made politically, militarily, and socially. The RVN was plagued by many problems and the DRVN and NFLSVN, unquestionably, were amongst those problems.