The Roman sword was patterned after the Celtic sword. The Celt sword could be long or short, but was most often short and was double-edged with a blood groove. The short Roman sword was the one Rome used to conquer the world.
Resources, their army, and money, were all dwindling after constant fighting.
Any answer choices? It's hard to help without them.
The more allies Rome had the more territory it could have under its control. Also the other places bring new cultures into Rome so that it could grow in that aspect as well.
Typically Northern Europe