I don’t want to sound pedantic, but tactics are how battles are directed. Battles win the campaign (operational) and the campaign is the strategy. So William Wallace and Maximus used clever TACTICS to win.
Saying that, ignore the pedantry: great, gritty realistic (horse rides past in background with headless rider)messy battle, well done HBO. Kenneth Brannagh’s Henry V battle (Agincourt in fact) scene now has competition for muddy medieval realism.