When was Thailand invaded by Vietnam?

After the Vietnamese army occupied Phnom Penh, the capital of Cambodia, while establishing and supporting the puppet regime, it stepped up its efforts to "clean up" and "mop up" the resistance forces in Cambodia and Hensaryn. 1From March to May, 1979, the Vietnamese army dispatched five divisions and successively captured Temobo, Bei Bo, Bailin, Sheng Da and other places in the border areas of Cambodia and Thailand, and carried out "encirclement and suppression" on the bases of the Cambodian National Army in the areas north of Maheng Mountain, Meilai Mountain and Shishufeng. From mid-September, the Vietnamese army began its second "dry season mopping-up". First, five divisions were used to "clear" the central and northeastern parts of Cambodia. Because the Cambodian National Army was smashed into pieces, the Vietnamese soldiers went to the empty buildings and achieved nothing except destroying and occupying some bases and logistics warehouses of the Cambodian National Army. From June 5438+ 10, the focus was on sweeping the northwest border area of Cambodia. 1 1 In June, it invaded some villages in the east and south of Mount Meilai, and constantly shelled and invaded Thailand.

In order to annex Cambodia for a long time, the Vietnamese authorities transferred a large number of cadres and backbones from China to assist the Cambodian puppet government in establishing puppet regimes at all levels and forming armed forces. And stepped up immigration to Cambodia, and about 700 thousand Vietnamese have moved to Cambodia to settle down. In order to legalize the invasion of Cambodia, Vietnam successively signed the Friendship Treaty, the Border Agreement and the Aviation Agreement with the Cambodian puppet government. In order to contain the forces of various factions in Cambodia, the Vietnamese moved to the battlefield in Cambodia and dealt with the Cambodian people in the same way that the Americans did with Cambodians. At the same time, they established "strategic villages" and "fortress villages" to strictly control the residents in the villages.