| Country | Military branches |
| Maldives | Maldives National Defense Force (MNDF): Marine Corps, Security Protection Group, Coast Guard (2011) |
| Mali | Malian Armed Forces: Army, Republic of Mali Air Force (Force Aerienne de la Republique du Mali, FARM), National Guard (2008) |
| Malta | Armed Forces of Malta (AFM; includes air and maritime elements) (2010) |
| Marshall Islands | no regular military forces; under the 1983 Compact of Free Association, the US has full authority and responsibility for security and defense of the Marshall Islands; Marshall Islands Police (2009) |
| Mauritania | Mauritanian Armed Forces: Army, Mauritanian Navy (Marine Mauritanienne; includes naval infantry), Islamic Air Force of Mauritania (Force Aerienne Islamique de Mauritanie, FAIM) (2011) |
| Mauritius | no regular military forces; Mauritius Police Force, Special Mobile Force, National Coast Guard (2009) |
| Mayotte | void |
| Mexico | Secretariat of National Defense (Secretaria de Defensa Nacional, Sedena): Army (Ejercito), Mexican Air Force (Fuerza Aerea Mexicana, FAM); Secretariat of the Navy (Secretaria de Marina, Semar): Mexican Navy (Armada de Mexico (ARM), includes Naval Air Force (FAN), Mexican Marine Corps (Cuerpo de Infanteria de Marina, Mexmar or CIM)) (2011) |
| Micronesia, Federated States of | no regular military forces |
| Moldova | National Army: Land Forces Command (includes special forces), Air Forces Command (includes air defense unit), Logistics Command (2010) |
| Monaco | no regular military forces; the Palace Guard performs ceremonial duties |
| Mongolia | Mongolian Armed Forces: Mongolian Army, Mongolian Air Force; there is no navy (2010) |
| Montenegro | Armed Forces of the Republic of Montenegro: Army of Montenegro (includes Montenegrin Navy (Mornarica Crne Gore, MCG)), Air Force (2011) |
| Montserrat | no regular military forces; Royal Montserrat Police Force (2010) |
| Morocco | Royal Armed Forces (Forces Armees Royales, FAR): Royal Moroccan Army (includes Air Defense), Royal Moroccan Navy (includes Coast Guard, Marines), Royal Moroccan Air Force (Al Quwwat al Jawyiya al Malakiya Marakishiya; Force Aerienne Royale Marocaine) (2010) |