| Time | Country | % Correct |
|---|---|---|
| 1846 - 1861 | United States of America | 99%
|
| 1865 - Present | United States of America | 99%
|
| 1821 - 1836 | Mexican Empire / First Mexican Republic / Centralist Republic of Mexico | 95%
|
| 1819 - 1821 | Kingdom of Spain | 91%
|
| 1836 - 1846 | Republic of Texas | 83%
|
| 1861 - 1865 | Confederate States of America | 70%
|