hi,
Generally we speak of " dark ages " . However, Historians prefer the terms "late antiquity " or "high middle ages" ( it cover the periode from 476 A.D to circa 1000 AD
Mediterranean Sea is the answer.
I would strongly suggest indaba. It allows each country to be heard and they can come to a conclusion quickly. They can only voice their opinion in a certain way. A country gives their Red Line in a diplomatic way and the other can respond with their hard limits.
Tropical rainforest, the high mountains and wild rivers were some of the physical obstacles that the Incas faced. They had to build a complex network of roads to link the entire Inca empire. They had messenger stations along these roads so that they could relay their messages, and they built shelters along the way for travelers.