evidence: The Naf War was a 3-day border clash that occurred in January 2000. During the clash, the Bangladesh Rifles (now Border Guard Bangladesh) and the Myanmar Army engaged in heavy fighting near the Naf River, before ending hostilities via a diplomatic truce. In 1966, an agreement was reached between the governments of Pakistan and Burma during the border settlement. According to the decision of this treaty, the middle part of the present-day Naf River sector is specified as the border of the two countries.The Naf River has twelve tributaries in Myanmar. As per the treaty, the middle part of the Naf River sector was recognized as the international boundary, Myanmar could not take any action in those sectors that would cause major changes in the course of the Naf River. But Myanmar ignored the agreement and built dams on eleven out of twelve rivers by 2000. As a result, the main flow of the Naf River shifted towards Bangladesh and about 2,500 acres of land was lost from the territory of Bangladesh. [1] In 2000, when Myanmar attempted to build a dam at the last branch, there were several rounds of meetings between the border guards of both countries. When this dam was built, it was feared that the Bangladesh part of the Naf River would break, so that the Teknaf town could disappear, so when the Bangladesh Rifles requested not to build the dam in accordance with the 1966 agreement, the Myanmar border guards sent a letter in rude and unprofessional language.[1]