Rome's Last Battle: Volturnus 554

Picked one by one from a mixed channel. Transcript check: both title readers certain; 4 of 5 sampled certain picks confirmed by transcript, none failed. Channel rule: Include long-form animated battle and campaign documentaries whose titles plainly name the battle, campaign or historical topic (e.g. 'Battle of X, year', 'Campaigns of Germanicus', 'Salt Trade and Rebellion in Medieval China'); exclude hook or clickbait-titled uploads, shorts, trailers and promos.