That's what happened. The plan was to build a Rampart (which I successfully did), take the single unit in the Treasury (behind the Fanatics), and place a portal in the Dungeon. I bought Pegasi and attacked. There were 16 Fanatics, and I would have won anyway, but they were positioned in a stupid way - 2 stacks were unblocked, and they managed to shoot down my Pegasi and then deal significant damage to my Trogols.
Thank you.