The Legend of Heroes: Trails of Cold Steel – Northern War is a 2023 Japanese anime miniseries based on the Trails video game series by Nihon Falcom. The series follows a conflict between the Erebonian Empire and the North Ambria State and is set during the ellipsis between the video games Trails of Cold Steel II and III. It follows Lavian Winslet, who leads a small platoon of Martin Robinson, Iseria Frost, and Talion Drake within the Northern Jaegers mercenary corps.

Northern War was produced by Tatsunoko Production and had twelve episodes aired weekly from early January to late March 2023. The series was licensed and dubbed in English by Crunchyroll. A spin-off mobile gacha game by UserJoy Technology was released in Japan in December 2023 and worldwide in May 2024.