I am very excited about these two games, both of them are grand strategy warfare games. Both allow multiple players to play the campaign online. I think both allow 14 players online to compete as separate realms.

Knights of Honor 2- If you are familiar with Total war is resembles their games.
https://www.youtube.com/watch?v=lnfj9-U_dRY

https://community.knightsofhonor.com/


Field of Glory: Kingdoms- More of an in-depth grand strategy game.
https://www.slitherine.com/game/field-of-glory-kingdoms