The fifth episode episode of season 18 of the PolyCast. Topics include the March Challenge of the Month, the Ides of March, some information about the Civilization Mobile Game, Millennia's release date and a Developer Diary about Ages, Large-Language Model Simulations tending toward violence, Civ4 Nationality vs. Civ6 Loyalty, and group victories., the 25th Anniversary of Alpha Centauri's Release, and where and when to build Government Plazas.