Kabaneri of the Iron Fortress: The Battle of Unato (2019)

In a post-apocalyptic Japan, the collapse of the central government has ushered in a warlord era. Walled cities, connected only by railways, struggle against the relentless "kabane" threat. Amid this chaos, a coalition forms, armed with steampunk weapons, armored trains, and the enigmatic "kabaneri." The story follows Koutetsujou's journey to reclaim Unato, a region overrun by Kabane, as they join the battle with the Hokuriku Allied Forces.