In most countries of Southeast Asia, the decolonization have been peaceful. In 1946, the first independence was declared. Between 1946 and 1963, Burma, Vietnam, Indonesia, Laos, Cambodia, Malaysia, Singapore, British Borneo, have obtained their independence. Six big powers dominated the region : the Great-Britain, the France, the Siam (in fact, Thailand), the United-States, the Japan and the Netherlands.
For the Philippines (1945) : In 1945, the independence is declared, but not officially. Osmena seize power, but Roxas, leader of Liberal Party, become the president of the Philippines. He was supporting by the United-States. Indeed, Roxas has made possible the creation of two americans bases. For the United-States, it was an excellent independence because they control the economy of the Philippines and they preserve their military presence.
The Indonesia (1950) : after the World War Two, the Central Administration of the Indonesia was functional. In 1950, the Indonesia have obtained the independence. At that time, in 1965, for the Indonesian army was important of killed the landless and communists. Of course, the United-States was allied of the Indonesia.
Concerning the Vietnam War (1964-1975) : after the war against the France, terminated in 1954, the Vietnam is not unify. In the North, the communists. Hô Chi Min was allied of the China. In the South, the rest of the population. Only, the intervention of the North in the problems of the South is annoying for president Truman. Between 1964 and 1975, the war have been terrible. The carpets bombing have been more important than during the World War Two, particularly difficult in the Cambodia and the Laos. The victims of the war are about 5 millions persons. The consequences are very important for the Laos, for example, because there is still some mines. The alloy of bombs is use for make of plates or of spoon. This spoon is an example.
In conclusion, the place of United States have been very important in the decolonization of Southeast Asia, but not without violences.