There are multiple types of boundaries, all of them being set by the humans, some following some natural features, some not. Some of the types of boundaries are the natural boundaries, geometric boundaries, and maritime boundaries.
The natural boundaries are set long a natural feature, like a river or a mountain chain. Examples of this type of boundaries are the boundaries between the USA and Mexico along the Rio Grande river, or the border between Macedonia and Greece along the Kozhuf and Nidze mountain ranges.
The geometric boundaries are usually set in places that are very sparsely populated, mostly in desert areas. We can see this type of boundary between Libya and Algeria.
The maritime boundaries are boundaries set on ocean/sea waters between an island nation and continental nation, or between two island nations. An example of this type of boundary is the maritime boundary between Japan and South Korea in the Japanese Sea.
Cincinnatus
Part of the Roman Republic
I haven't been in a history class 4 years you may want to fact check it
The Roman empire was well organized with good roads & active trade, so the new religion could spread easily. Constantine was a sun worshipper who feigned Christianity so he could take control and throw out it's one and only goal
Answer:
In around 500bc the Germanic tribes were living on southern shores of the Baltic and to the south of Scandinavia. There was a tribe called the Franks living in what is today Germany and they moved west to conquer the Roman Gaul. It was not named France at that time but the kingdom of Franks and at one point the king of the Franks Charlemagne was crowned as the Holy Roman emperor, the first emperor after the fall of Western Rome.