in
Island

Mayotte
claimed by Comoros

Mexico
prolonged drought, population growth, and outmoded practices
and infrastructure in the border region have strained water-sharing
arrangements with the US; nationals from Central America slip into
Mexico seeking work or transit into the US; undocumented Mexican
nationals continue to enter the United States

Micronesia, Federated States of
none

Midway Islands
none

Moldova
difficulties with the Transnistria region complicate
controlling border crossing and customs regimes with Ukraine,
despite concordance on 2003 delimitation and customs protocols and
OSCE assistance

Monaco
none

Mongolia
none

Montserrat
none

Morocco
claims and administers Western Sahara whose sovereignty
remains unresolved - UN-administered cease-fire has remained in
effect since September 1991, but attempts to hold a referendum have
failed and parties thus far have rejected all brokered proposals;
Morocco protests Spain's control over the coastal enclaves of Ceuta,
Melilla, and Penon de Velez de la Gomera, the islands of Penon de
Alhucemas and Islas Chafarinas, and surrounding waters; Morocco also
rejected Spain's unilateral designation of a median line from the
Canary Islands in 2002 to set limits to undersea resource
exploration and refugee interdiction, but agreed in 2003 to discuss
a comprehensive maritime delimitation; Morocco serves as one of the
primary launching areas of illegal migration into Spain from North
Africa

Mozambique
none

Namibia
commission established with Botswana to resolve small
residual disputes along the Caprivi Strip, including the Situngu
marshlands along the Linyanti River; Botswana residents protest
Namibia's planned construction of the Okavango hydroelectric dam on
Popa Falls; managed dispute with South Africa over the location of
the boundary in the Orange River; Botswana, Namibia, Zambia, and
Zimbabwe boundary convergence is not clearly defined or delimited;
Angolan rebels and refugees still reside in Namibia

Nauru
none

Navassa Island
claimed by Haiti, source of subsistence fishing

Nepal
joint border commission continues to work on small disputed
sections of boundary with India; India has instituted a stricter
border regime to restrict transit of Maoist insurgents and illegal
cross-border activities

Netherlands
none

Netherlands Antilles