Looking for game / game idea?

I’ve had this idea of a game for a while now and was wondering if there was anything close to it that I’m not aware of.

In summary, it’d be an online multiplayer shooter or medieval war game that keeps going whether you’re online or not; the game doesn’t revolve around timed matches or score, but is an ongoing battle.

Each server has one ginormous map with a couple factions made up of a couple hundred players and they fight for territory. You would play as a fighter for one faction and get points along the way for what you accomplish (kills/objectives taken/revives/etc) that can be exchanged for upgrades, items, consumables, and cosmetics.

Ways to win: one faction conquers all the land OR whoever has the most land after a set time (1 week for example).

Point of the game is to be an ongoing war even when you’re offline. You may be winning by the time you log off but it might not be the same tomorrow.

Land could be accumulated for your team by taking over strategic points such as cities or bases/forts. The defenders would have the upper hand obviously.

I’m imagining some combination between ARMA 3 + Dust 514 + Defiance for a shooter OR Skyrim + Lord of the Rings + Age of Empires for a medieval game. IMAGINE ALL THE RECREATIONS OF THE EPIC WAR SCENES! Trebuchets, volleys of arrows, epic sword fights!

Any ideas or anything similar?