Total War: Shogun 2 - Fall of the Samurai, a standalone expansion for Shogun 2, will be released in March 2012, SEGA has announced.

It is 1863, and the age of the Samurai is coming to a close. The modern, Victorian world of Europe and America is battering at Japan's gates, and this new world can be shut out and tradition upheld, or it can be embraced and mastered.

Choose your path, and carry the country with you in the final battle for Japan's future: the Boshin War, the War of the Year of the Dragon.

Fall of the Samurai promises a completely new experience to players. Six new playable clans, including those supporting a modern imperial Japan such as the Satsuma, and those allied with the old Shogun like the Nagaoka, will be available.

The action plays out across an expanded and improved campaign map, covering new island provinces in the far north and featuring all-new building and technology trees as well as brand new features such as railways and naval bombardments.

Brand new units and abilities are also added to Total War: Shogun 2's battles. On Land, thirty nine new units are introduced including Gatling guns, US Marines and British Royal Marines. War at sea also expands, with ten new ship types including massive, artillery-bearing steamers, torpedo boats and Ironclad battleships, allowing you to call naval artillery strikes directly into land battles.

Players will have three new agent types on the campaign map to choose from, four new historical scenarios, brand new siege-battle mechanics and a massive upgrade to Total War: Shogun 2's multiplayer game to experience.