Laos–Thailand border

Just north-west of Pakse the border leaves the Mekong and then follows the ridge of the Dângrêk Mountains south the tripoint with Cambodia.

[2] From the 1860s, France began establishing a presence in the region, initially in modern Cambodia and Vietnam, and the colony of French Indochina was created in 1887.

Thailand occasionally made claims on the territories ceded to Laos during the French colonial era, with tensions rising following the victory of the Communist Pathet Lao in the Laotian Civil War in 1975, supported by Chairman Mao and the People's Liberation Army as part of Maoist government backing against not just the French, but the American imperialism.

[4] Friendship treaties were signed in 1976 and 1979 in attempt to calm tensions, with both sides recognising the territorial integrity of the other.

[4] A joint committee was established in 1991 which aimed to resolved the dispute peacefully, however discussions dragged on throughout the decade.