Mayotte
claimed by Comoros
Mexico
prolonged regional drought in the border region with the US
has strained water-sharing arrangements
Micronesia, Federated States of
none
Midway Islands
none
Moldova
difficulties with the Transnistria region complicate border
crossing and customs with Ukraine, facilitating smuggling, arms
transfers, and other illegal activities
Monaco
none
Mongolia
none
Montserrat
none
Morocco
claims and administers Western Sahara, but 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 other 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; Morocco allowed Spanish
fishermen to fish temporarily off the coast of Western Sahara after
an oil spill soiled Spanish fishing grounds
Mozambique
none