Answer:
The historical circumstance that led to this development was the European exploration and their desire for raw materials that eventually led to Imperialism.
i have no idea if its the answer i still have to catch up with my maps hehehe
Constantine made Constantinople the capital of the Byzantine Empire in 330 because it was well protected, had a great location, and was wealthy. The city was rich and successful for so long because it was well protected by water on three sides and had land and sea walls!
Ethnic Group
thats the answer