Country events like wars, earthquakes or the future of a country have their own prediction tool, which is Taiyi Shensu. I have not studied this art, which is one of the Three Styles of Divination (三式), the others being Da Liu Ren and Qimen Dunjia.
Some practitioners use Bazi of the day to analyze such an even, but I would not do that. Fengshui of the Capitol Building can certainly be analyzed, which can be an interesting but challenging task if somebody wants to share here.