Taiwan-Brunei-China-Malaysia-Philippines-Vietnam: involved in complex dispute over the Spratly Islands in the South China Sea that are thought to have large oil and natural gas reserves, as well as being located amidst prime fishing grounds and busy commercial shipping traffic; the Spratly Islands also are in a strategic position for establishing a military presence to monitor activity in the South China Sea; the 2002 "Declaration on the Conduct of Parties in the South China Sea" has eased tensions but falls short of a legally binding "code of conduct" desired by several of the disputants

Taiwan-China-Philippines: border dispute over the Scarborough Reef in the South China Sea; Scarborough Reef, like the Spratly Islands, is strategically located and is surrounded by abundant fishing grounds; it may also be ripe for oil and natural gas exploration

Taiwan-China-Vietnam: the Paracel Islands are occupied by China but claimed by Taiwan and Vietnam

Taiwan-Japan-China: in 2003, China and Taiwan became more vocal in rejecting both Japan's claims to the uninhabited islands of the Senkaku-shoto (Diaoyu Tai) and Japan's unilaterally declared exclusive economic zone in the East China Sea where all parties engage in hydrocarbon prospecting; Senkaku-shoto is situated near key shipping lanes, rich fishing grounds, and possibly significant oil and natural gas reserves

Thailand-Burma: in 2016, Thailand expressed its interest in investing in Burma’s Hatgyi Dam project on the Salween River near the Thai-Burma border; the dam has the potential to supply electricity and water during the drought season; approximately 100,000 mostly Karen refugees fleeing civil strife, political upheaval, and economic stagnation in Burma live in nine remote camps in Thailand near the border

Thailand-Cambodia: Cambodia and Thailand dispute sections of their border; in 2011, Thailand and Cambodia resorted to arms in the dispute over the location of the boundary on the precipice surmounted by Preah Vihear temple ruins, awarded to Cambodia by ICJ decision in 1962 and part of a planned UN World Heritage site; in 2013, the International Court of Justice ruled that the land with the temple was Cambodian territory but that a nearby hill belonged to Thailand

Thailand-Laos: talks continue on completion of demarcation with Laos but disputes remain over several islands in the Mekong River

Thailand-Malaysia: separatist violence in Thailand's predominantly Malay-Muslim southern provinces prompt border closures and controls with Malaysia to stem insurgent activities; disputed areas are the Bukit Jeli area at the headwaters of the Golok River and the continental shelf boundary in the Gulf of Thailand

local border forces struggle to control the illegal transit of goods and people across the porous, undemarcated Armenian, Azerbaijani, and Georgian borders

Armenia-Azerbaijan: tensions existed for years over the break-away Nagorno-Karabakh region and the Armenian military occupation of surrounding lands in Azerbaijan; Azerbaijan seized part of the enclave during six weeks of fighting in 2020 and the remainder in a short conflict in September 2023; in October 2023, Baku and Yerevan began preliminary discussions on a peace treaty, the demarcation of borders, and full normalization of relations; nevertheless, concerns persist in Armenia that Azerbaijan could invade in order to force the establishment of a transit corridor to the exclave of Naxicvan (Nakhichevan) 

Armenia-Georgia: Georgians restrict Armenian access into Samtse-Javakheti ethnic Armenian areas; Armenia has made no claims to the region

Armenia-Iran: none identified

Armenia-Turkey: as of 2023, Turkey and Armenia were discussing normalizing relations