Falling Sky stays as one of my favorite COIN (Counter Insurgency) games - not only due to great design but also because unlike most titles in the series, tackles the ancient period :) Vassal implementation allows you to play async - below session report from one of our long, exciting sessions. Enjoy!
https://theboardgameschronicle.com/2023/03/05/falling-sky-playing-the-pax-gallica-54-bc-scenario/