Free Khmers of Son Ngoc Thanh (1907-1976) were aligned with the Viet Minh. In Laos, the Pathet Lao under Souphanouvong (1901–1995) also fought against the French. The three communist factions formally formed the Viet-Khmer-Lao alliance on 11 March 1951. In the cold war period, the United States was following the containment strategy and helped
France by giving military aid. It was supporting the French Indochinese budget to the extent of 85 percent and it assisted up to 40 per cent of military budget of France in the First Indochina War by 1952. The French had consolidated their position in south of Vietnam. In March 1949, southern part of Vietnam became an Associate State within the French Union along with Laos and Cambodia. By 1950, South Vietnam had been recognized by the United States and Great Britain. The establishment of People’ Republic of China was very favorable to DRV. China recognized the Government of Hanoi and supplied military material as per the agreement of April 1, 1950.Soviet
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