Can I Teleport into my Castle under siege?

[Norfleet]

If you teleport into a castle to reinforce a garrison that is sallying, your arriving mage will, as NTJedi put it, land in the castle and drink beer.

One upside, however, is that if the original garrison sallies and is defeated, the fact that you've landed reinforcements in the castle will prevent it from immediately falling. If the entire garrison opts to sally forth and do battle, and they lose, you lose the castle instantly.