Oldest Sovereign Countries

Name the 10 oldest countries by date of last subordination.
Source: Wikipedia.
Excludes the United Kingdom because it's "mother country" is the same country under a different name.
Quiz by imaninjakilla
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Last updated: December 1, 2017
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First submittedDecember 1, 2017
Times taken79
Average score70.0%
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Year
Location
Mother Country
Modern Country
301
Europe
Roman Empire
San Marino
1139
Europe
Portugalia
Portugal
1516
Europe
Castile / Aragon
Spain
1523
Europe
Denmark
Sweden
1634
Asia
n/a
Bhutan
1719
Europe
Schellenberg / Vaduz
Liechtenstein
1743
Asia
Persia
Oman
1768
Asia
n/a
Nepal
1781
North America
United Kingdom
United States
1804
North America
France
Haiti
+1
Level 85
Dec 1, 2017
It appears to me that the UK split Zanzibar from Oman in the mid 19th-century. If Oman were truly sovereign, why did it let another country do that?
+1
Level 55
Dec 2, 2017
They were both under Said bin Sultan, when he died one of his kids became the Sultan of Muscat and Oman, the other became Sultan of Zanzibar. Regardless, the UK had power because they were all British Protectorates at the time.