SHINSENGUMI
You will be able to know what Shinsengumi is from a linked site. They were Samurai who worked for the Shogun from 1863 until 1888 and they battled ronins attempting to assasinate him to change the power from the Shougun to the Emperor. They had still fought even after the Shogun lost the power in 1868 and the country was opened. They were killed at the end but their activities went down in history and they -most of members were around 30 years old, were given the honor as histrical nobles.
Actually I know them so cool, and a story about them or history was interesting and amusing.