Avatar: Fire Warrior

A man finds himself in the body of Admiral Chan’s son from Avatar: The Last Airbender. This is the story of how the Hundred Year War might have ended if an otherwise insignificant man had been taken over by someone else—someone with foreknowledge and a different perspective on the situation. Expect a story shaped by militarism, loyalty, bias, and a far less flattering view of the original series’ protagonist. — Description from novelcodex.org