Falco, the Brave General of the Source Star! There Lies the Shadow of Raoh.

Falco, the Brave General of the Source Star! There Lies the Shadow of Raoh.

Available on Prime Video, Crunchyroll
S5 E9: As Kenshiro and the Hokuto Army approach the Imperial Capital, he learns about how Falco sacrificed his right leg to save his village when threatened by Ken-Oh and his army.