Saga of Tanya the Evil Ep 10

Man. That was a massive win, but it's hard to celebrate because so many other people are taking the L... This episode was insane tho... the tunnels and 💥 Damn! I can't remember which historical battle had some castle undermining in it? I might be mixing up history but I feel like there was some English army that dug under and blew something up. Might be remembering that completely wrong