Blade of Destiny Online or simply known as B.O.D. Online is a client based MMORPG loosely based on the war between the Yin and the Zhou dynasty in Ancient China. Although the land is known as Tokyo, all other aspects of the game are based on Chinese history.
Aside from the usual quests and missions that a player can do in the game, B.O.D. Online has a war system that activates periodically where anyone can join in the battle to protect their dynasty.