War machines in Heroes V.

It depends on how much you play. If your army simply consists of legions of creatures, then any stack of 1000 archers will take down that catapult with the first shot.

In Five, the siege is quite spectacular, by the way, and the music is well-chosen. But still, in the fourth part, the besieged Castle had towers that gave a giant advantage. That's what I liked. I didn't like the lack of siege equipment to somehow deal with tower units. And Order ruled big time there. Using first-level movement with almost no mana loss was the only way to push enemies off the towers. But what was really cool was that the besieged army could be several times weaker than the besieging one and still win the battle; the walls and towers gave a very large advantage))

As for Five... Well, it's like Three, just noticeably more beautiful.