
Originally Posted by
Valentinian Victor
We have gone over this ground a number of times before. As most of you know I do not believe the Sasanids were the greatest threat, they never managed to sack a Roman capital city after 260AD, the border between the Sasanids and Romans remained largely intact until the Arab conquests put pressure on both Empires, and Roman field armies were more than able to deal with Sasanid field armies, again as discussed elsewhere.
I think because the Roman's perceived the Sasanids were more of a threat than they were they took their eye off the ball of the real threat, that of the Goth's, hence the calamity of what happened from 376AD onward in the West.