[@babbysama]

Part of our goal in defense should be creating a rallying cry for the western nations after the siege is done, something that the armies and the common folk left behind could rally behind.  A second part should be to weaken the morale of the enemies forces.  Traps, caltrops, and that brilliant idea of burning barrels (pots is a little better) if this was a thinner canyon, would be amazing.  But we need to send a message.