The siege is meant to be played on as defender. But offense would work fine too.
The people of Mulholland Castle were losing hope as the soldiers were slaughtered. In three months, Lord Minoras will attack again. He had wanted to control all wheat producing castles and had no mercy when taking them over. If some how one could some how survive, perhaps the rest shall start a revolt... . The battle horns sounded and the weary men were ready to start a history.
River was used to replace moat because the enemy kept digging and not attacking the lord.
If you're playing with version 1.2, please make the swordsmen on the "bridge" set to defense. We wouldn't want it to be destroyed by its defending army. ^^