Brilliant, great success! It seems that the odds were on our side, even having a retreating Catapult. How wounded are our units after battle? We may need to stop to heal a bit. Do we have any medics around (Galleys, or units)?
It's now partially a gambling game, and a little difficult to judge. If Loco puts up a strong defence, then it might be best to jump back in the boats to save the lives of our units, and perhaps move around for another coastal attack on the next city (Reading, it appears). Then again, if Loco are in fact very weak, it might be worth taking a pot shot at rushing towards their capital, in case they haven't had time to scrape together anything more than Warriors and Archers there yet.
Overall, based on how they've been playing, I reckon that Loco won't have much defense in their capital, so it might be worth taking the risk to go raze it. Still, it's difficult to judge.