A high-level hero, level 21. However, no squad manages to reach the demons. They sit in the city, and the catapult hits everywhere but the gate, as usual. Paladins stand in the moat opposite the breach in the wall and... succubi one-shot them.
Added 6 minutes later
On the twentieth attempt, I managed to take the city, as this time the hellhounds ran out of the city, thus opening the gate. But the losses are simply enormous. All the archers, half of the inquisitors, and the horses. Let's see what happens next...
Well, I've added the possibility to break through using an alternative method with the help of the old man, with fewer losses. But this way also works. Although you'll need the archers later.