All the same, the fleet is good for retreats.

But then again, why did you retreat your fullstack? Just duke it out. It's a legion, for godssakes. If you decided to retreat a Roman fullstack against Carthies that probably can't beat your generalship, then you definitely deserve to lose that legion, so get back to the playing map and build another one to salvage your folly! Don't take the coward's way out.

It's punishable by decimation, you know. ;-)