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; the US has stepped up efforts to stem
nationals from Mexico, Central America, and other parts of the world
from illegally crossing the border with Mexico
Micronesia, Federated States of
none
Midway Islands
none
Moldova
Moldova and Ukraine have established joint customs posts to
monitor transit through Moldova's break-away Transnistria Region
which remains under OSCE supervision
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; discussions
have not progressed on a comprehensive maritime delimitation setting
limits on exploration and refugee interdiction since Morocco's 2002
rejection of Spain's unilateral designation of a median line from
the Canary Islands; Morocco serves as one of the primary launching
areas of illegal migration into Spain from North Africa
Mozambique
none