I'll admit I love watching anything to do with Ancient Rome.
As a teenager, I studied Lingua Latina and translated, for example,
the writings of Julius Caesar and all the exploits throughout his career.
The Roman Army around 43AD was the most dangerous and skilled in the World;
and Ancient Rome ruled most of what was the known World, they may lose a battle here and there, but rarely lost a war.
After every battle a Legions Commander would write about both his and the enemies tactics, and send a dispatch to the Sergeant Major Of The Army, back in Rome - who would copy same, and send it to every other Roman Legion General. This way every Commander had full knowledge of the enemy. And it worked.
Britannia shows just how ruthless the Roman Army and their Generals were.
Kind of like, take no prisoners. Even the children were killed. Why? Because the Generals learned that when the kids grew up, they would want revenge.
There's a lot of action in Britannia and the Roman General in Britain is especially cruel. And smart.
For anyone who likes this time period, don't dwell too much on any perceived 'historical inaccuracies', just sit back and enjoy the ride. The opening music by Donnavan sets the mood. In part to me Britannia was both great and slightly crazy. Well worth your time.