Medieval Kingdoms: Total War is a total conversion of Total War: Attila with brings the game to the high middle ages, set in the starting year of 1212 AD going until 1453 AD. This mod will completely revamp the game with new factions, units and much much more! (Yes this is the same mod team as for the Rome 2 version.)
Work is being done on the Khwarezmian Empire and the team member working on em made these banners to go along with them.
This looks like the Moorish banner.