Moldova:
27 August 1991 (from Soviet Union)
Monaco:
1419 (beginning of the rule by the House of Grimaldi)
Mongolia:
11 July 1921 (from China)
Montserrat:
none (overseas territory of the UK)
Morocco:
2 March 1956 (from France)
Mozambique:
25 June 1975 (from Portugal)
Namibia:
21 March 1990 (from South African mandate)
Nauru:
31 January 1968 (from the Australia-, NZ-, and
UK-administered UN trusteeship)
Nepal:
1768 (unified by Prithvi Narayan Shah)
Netherlands:
1579 (from Spain)