This period was known as the baby boom, and this generation is still referred to as the "baby boomers," this being because there was a huge increase in the birth rate as people returned home from the war.
The answer is: The sea
Back then, the techology that exist to travel by sea was not as developed as it is today. If an empire decided to travel through the sea in order to do some conquests, that empire will risk several things, such as:
- Loss in directions
- The ships could be swallowed by harsh wheather in the middle of the sea
- It need a lot of resources to maintain the armies during the travel
Answer:
These things being that they were both built around important river and they relied on the rivers for agriculture.
Explanation: