They gained control over many byzantine trade routes. The first is your answer
It grew exponentially in this period because in the aftermath of the second world war, there was a baby boom as a result of numerous young couples created by high amounts of returning soldiers.
It would be Austria-Hungary’s imperialist ambitions to dominate the Balkans, as they couldn’t possibly stay a united country as there was many different languages and cultures which led to struggles for independence which led to the assassination of Archduke Franz Ferdinand by a Serbian terrorist organization
Khans
The khans was the name given to successor of the mongolian empires. The khans were ruling over central Asian mongolian nomadics and ruled over vast territory.
