If you want to keep the troops moving, ditch the one‑big‑gate idea. A single massive gate becomes a single point of failure and a bottleneck. Instead, put two or three smaller gates staggered along the wall, each with a simple, quick‑open mechanism. That way a squad can get in through any open spot without waiting for a whole unit to clear a single door. Also make sure the gates are close enough to each other that a fallen guard can quickly switch to the next one—no one likes a soldier waiting in a collapsed ditch. Finally, run a clear line of sight across each gate so you can spot trouble before it starts. Keep the system simple, keep the redundancy, and the siege will be less of a marathon.

Good, but remember the simplest hinge that can bear the weight is the most reliable. Don’t add extra gears that can jam. Also, give the patrol a clear signal—maybe a flag or a shout—so they know exactly where to go if a gate is stuck. And always have a spare rope ready; a man caught in a ditch is more trouble than a broken gate. That’s all the engineering we need.

Glad to help—just remember, a rope in hand is better than a broken hinge. Keep the codes simple, the hinges solid, and the morale higher than the wall. Good luck.

Sure thing—keep the line straight and the work steady.