I'm waiting to see his blanket push back towards his city since the CS is right next to his last city, but it never happens. I take out what looks like a rush-bought unit while lining up for the siege and become allied with the CS due to helping them in war. Their map lights up and i see
eight units still attacking the CS. He has a mix of hoplites, cavalry, and archers over there, but none turn back to help out his last city. His civ is conquered two turns later.