| period | empire/state | % Correct |
|---|---|---|
| 19th century | British Empire | 100%
|
| 20th century | United States of America | 100%
|
| 21st century | United States of America | 100%
|
| 15th century | Ottoman Empire | 94%
|
| 16th century | Ottoman Empire | 94%
|
| 1st century | Roman Empire | 88%
|
| 2nd century | Roman Empire | 88%
|
| 4th century | Roman Empire | 88%
|
| 11th century | Song Dynasty | 81%
|
| 9th century | Tang Dynasty | 81%
|
| 17th century | Spanish Empire | 75%
|
| 6th century | Byzantine Empire | 69%
|
| 18th century | France | 63%
|
| 13th century | Mongol Empire | 63%
|
| 5th century | Gupta | 44%
|
| 8th century | Abbasid Caliphate | 31%
|
| 7th century | Umayyad Caliphate | 31%
|
| 3rd century | Sassanid Empire | 25%
|
| 14th century | Timurid Empire | 25%
|
| 10th century | Byzantine Empire | 13%
|
| 12th century | Khwarezmian Empire | 6%
|