Banner of the Stars III (2005)

Jinto and Lafiel were riding on the lightly-armed transport ship Bokbrusue and navigating at the planar space of the Hyde System. This was for Jinto to govern the Hyde System, which returned to imperial rule after the Union retreated, officially as an Earl. However, the government of Martine, Jinto's motherland, resisted obstinately against the Empire. Meanwhile, the First Devastation Fleet, formed with a new ship type called Attack Vessel, traveled to the Hyde System for drilling practices...

Unfortunately the movie Banner of the Stars III is not yet available on HBO Max.