October Meiji 1st, the remaining force of Edo goverment landed on Hokkaido and declared that they are an independent new government of Ezo-republic.
But, April Meiji 2nd, the new Tokyo government decided to eliminate this small unauthorized new country. http://en.wikipedia.org/wiki/Battle_of_Hakodate
The battle of Hakodate is the very last episode of Bakumatsu which ended the long continued Edo govenrment and opened the new age of modern Japan.
The game uses
Basically modified version of card-driven game and played in 2 hours.