Sega announced today that Total War: Shogun 2 is getting a new downloadable campaign, titled "Rise of the Samurai." It will include both single and multiplayer modes with a bevvy of new unit types. The samurai will rise in September, but pricing for the expansion wasn't revealed in the announcement.

The expansion will add six new clans, including 16 new land units and 10 new naval units. Each of the new land and naval units are deployable online, along with 10 mons and retainers. Four new hero units include the Tetsubo Warrior Monk and the Onna Bushi. You'll also get four agent types, complete with skill trees, like the seductress Shirabyoshi and the Junsatsushi Inspectors.

The story will take place 400 years before the story of Shogun 2, and will detail the Gempei War, which pitted clans of the Taira, Minamoto, and Fujiwara families against each other. The conflict ultimately brought the samurai to power in Japan. If you like some historical education mixed with your strategy titles, natch.

Shogun 2 received a positive reception here at Shack, with some slight reservations for strategy novices.