In this example, move your stack to the hill with the horse resource. Stay on the high ground, where possible, to prevent a successful counterattack.

Meanwhile, destroy  the roads leading to the coal, iron and horses, to prevent the enemy from creating new units.

This stack includes 8 cannon, 4 riflemen, 4 cavalry, and a cavalry army led by Ramses. The city is defended by riflemen.

Once in place on the hill next to the city, use extensive bombardment -- over several turns, if need be -- until there is little or no resistance in the target.