Ethiopia-Eritrea: Eritrea and Ethiopia agreed to abide by the 2002 Eritrea-Ethiopia Boundary Commission's (EEBC) delimitation decision, but neither party responded to the revised line detailed in the November 2006 EEBC Demarcation Statement

Ethiopia-Somalia: the undemarcated former British administrative line has little meaning as a political separation to rival clans within Ethiopia's Ogaden (populated largely by ethnic Somalis) and southern Somalia's Oromo region; the Somalia-based terrorist group al-Shabaab has conducted cross-border assaults into Ethiopia as recently as 2022

Ethiopia-South Sudan: while border clashes continue in the al-Fashqa (Fashaga) area, the US views the 1902 boundary treaty between Ethiopia and Sudan as being in force

Ethiopia-Sudan: Ethiopia's construction of a large dam (the Grand Ethiopian Renaissance Dam) on the Blue Nile in northern Ethiopia since 2011 has become a focal point of relations with Egypt and Sudan; Egypt has described the giant hydroelectric project as an existential threat because of its potential to control the flow of the river that is a key source of water for the country; Ethiopia completed filling the dam in 2023

Syria-Iraq: none identified

Syria-Israel: Golan Heights is Israeli-controlled with UN Disengagement Observer Force (UNDOF) patrolling a buffer zone since 1974; because of ceasefire violations and increased military activity in the Golan Heights, the UN Security Council continues to extend UNDOF’s mandate; since 2000, Lebanon has claimed Shab'a Farms in the Golan Heights

Syria-Jordan: the two countries signed an agreement in 2005 to settle the border dispute based on a 1931 demarcation accord; the two countries began demarcation in 2006

Syria-Lebanon: discussions on demarcating the two countries’ maritime borders were held in April 2021, after Syria signed a contract with a Russian company to conduct oil and gas exploration in a disputed maritime area, but the issue was not resolved

Syria-Turkey: none identified

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