It would be five years to defeat the Incas and the Mayas.
No not really unless you count the Hain empire. There were many small states that fought each other for control of Japan. Then Tokugawa set off to reunite all of japan.
12
11 years
For how many years constantinople the capital of a united roman empire ?
150 years
The Austro-Hungarian Empire faced many problems. One of which was the pure size of the Empire. Another problem was its defeat in World War I.
around 200 years.
around 200 years
8 years
12 years
1519