Thailand
See also: Siamese–Vietnamese wars and Vietnamese border raids in Thailand
Anti-Vietnamese sentiment in Thailand has been the direct result of Vietnamese expansionism in the past, with indication of fears about Vietnamese conquest in the history.[6] Since the war between two started at 18th century, Siam had only won one direct conflict, with the others were all indecisive or Siamese defeats to Vietnam, manifested the theory of Vietnamese aggression and imperialism on Thai people. Thailand also later participated in the Vietnam War, and took prides for its participation.[23]
When the Khmer Rouge was overthrown in Cambodia, Thailand was one of the main countries that harbored Khmer Rouge's leader and provided them ammunition against Vietnamese forces, owning by the old historical fear against Vietnamese invasion,[24] and accusation over Vietnamese plan to invade Thailand inflamed anti-Vietnamese sentiment in Thailand.