What geographic feature protected Rome from an invasion from the north?

a. the Tiber River
b. the Italian Alps
c. the Hills of Rome
d. the Tyrrhenian Sea

What were three advantages the north had in the civil war? it was fighting most battles on home ground. it had a greater number of soldiers. it had more highly skilled military leaders. it had a stronger navy. it had a better network of railroads. pick three .