Age of Giants

The year is 820! Some of bigger empires ever are sharing frontiers: the Frankish Empire, the Abbasid Khalifate and the Byzantine Empire. In our reality, the three had seen their own fall, but in the Age of Giants they increased in size so savagely that, sooner or later, just one will remain standing! Or no...

And the brutal tribes of East and North... Don't think they will stay quiet under all this

Timeline

 * 820 AD: Start of Byzantine-Arab Wars.