It was over about 6 turns, with 3 valiant Hussar units attacking a single square, with artillery being brought up in support and a large infantry unit moving to charge distance too. In the mean time, my other infantry swept over the right flank and only had an artillery unit between them and taking the defender's objective.
I'd quite happily lose 2 infantry units to a large proportion of my opponent's forces and take his objective. I also think that quite a few turns of concerted attack by 3 times the number of cavalry as well as artillery fire on a square should be enough to run one over.