The history of Dai mountain -This was a dangerous forest area. Between 1962–1967, this place was a base of An Giang Provincial Party Committee in Vietnam War. According to the story, in 1969 a front-line platoon of 61 was bombed by enemy aircraft. The mouth of the cave collapsed. Seven soldiers were trapped in the cave. The seven soldiers used bamboo tubes to bring milk and porridge. After a few days, the unit had to leave the teammates and retreat to U Minh forest.