Rurouni Kenshin's Shinsengumi

As an assassin during the Bakumatsu, the Battousai, Kenshin Himura often faced the Shinsengumi in the bloody streets of Kyoto. Advocating for different ideals, Kenshin crossed swords many times with the Shinsengumi Captains, particularly Saitou Hajime and Okita Souji. After he left his life of killing behind after the battle of Toba-Fushimi, he may have thought that the Shinsengumi was behind him, even if any of his old antagonists had survived into the Meiji era. But when Shishio Makoto begins to threaten the peace of the new era, Kenshin's dreams of the Shinsengumi become too real as one of them appears in his life again...

The mangaka, Watsuki Nobuhiro, usually credits fictional sources - novels, etc - for his take on the Shinsengumi and characters that were inspired by the Shinsengumi. Of the "Moeyo Ken" novel series by Shiba Ryotaro, he referred to it as "his bible", and blending that with other novels, video games and his own ideas, Watsuki presented a version of this Shinsengumi that captured fans around the world.

Note:"Eikura" in the Shinsengumi image is actually "Nagakura". Thank you to Mina for pointing it out.