Had a very strange occurrence during my Mori campaign. I was defending Settsu castle (west of Kyoto with research bonus), a stronghold (have an outer bailey), and, when the battle started I had 2 very odd gaps in my outer walls, at the opposite ends of the castle. Possibly where the towers should have been.

However, the mysterious gaps acted as an escalator for the enemy, and, as you can see, they made their way up without trouble.





This just caused them to bunch up conveniently and they got massacred.

However, not long after the second shot was taken, with half the enemy dead or running off, and the remaining enemy (all archers) still standing around outside the castle, and with 90% of my troops still alive, I somehow lost the battle... I had a unit standing on the flag spot near the keep too.