ok so, The battle of edessa took place between the armies of the roman empire
accoring to roman sources which are not very clear roman army was defeated and taken away by the persain froces. valerian as soon as posible tried to renigociate but he was captured. it is possible that his army surrendered after that. The prisoners included, according to Shapur's claims, many other high-ranking officials, including a praetorian prefect,[9] possibly Successianus
The mountains, islands, and seas isolated and separated and divided Greece into small groups that became city states. The sea allowed Greeks to trade food by traveling over water
Because they where finding new and better ways to use power so it made the industry bigger
If, the war described in the question is referred to second war then:
This war was considered as the greatest war configuration in the history in the humanity unleashed by nazi Germany, fascist Italy and militaristic japan.
At the early years of the war the ally countries were France, england and soviet Union.
The largest losses corresponded to the Soviet Union wich lost 27 million people.