| Year | Former | Renamed To / Annexed By | % Correct |
|---|---|---|---|
| 1989 | Burma | Myanmar | 96%
|
| 1951 | Tibet | China | 93%
|
| 1935 | Persia | Iran | 92%
|
| 1949 | Newfoundland | Canada | 89%
|
| 1976 | East Timor | Indonesia | 89%
|
| 1945 | Kaliningrad | Russia | 88%
|
| 1932 | Siam | Thailand | 87%
|
| 2018 | Swaziland | Eswatini | 84%
|
| 1971 | East Pakistan | Bangladesh | 82%
|
| 1997 | Zaire | Democratic Republic of the Congo | 82%
|
| 1921 | Mesopotamia | Iraq | 82%
|
| 1953 | French Indochina | Vietnam / Laos / Cambodia | 82%
|
| 1825 | Uruguay | Brazil | 81%
|
| 1975 | Sikkim | India | 81%
|
| 1972 | Ceylon | Sri Lanka | 80%
|
| 1939 | Danzig | Germany | 78%
|
| 1926 | Abysinnia | Ethiopia | 77%
|
| 1946 | North Borneo | Malaysia | 76%
|
| 1798 | Helvetic Republic | Switzerland | 58%
|
| 1966 | Basutoland | Lesotho | 55%
|
| 1939 | Hatay | Turkey | 50%
|
| 1944 | Tannu Tuva | Soviet Union | 45%
|
| 1915 | Moresnet | Belgium | 21%
|