I went through a couple of dozen of them.
They start off with some interesting bits, but then they really start to repeat a loop of somewhat racist attitudes and milking the semi-harem building in different points in time. While the first ten or so follow strictly chronologically, they then start jumping all over the place and doing parts in flashback which gets a wee bit annoying.
There are some elements of nice history, but it does get wrapped up in a lot of stupid at points.
Edit: Also, one of the first things that happens is that the Roman Soldier, becomes a slave next to a foreign traveller who turns out to be a martial arts expert from the far off lands of asia. So, he picks up Kung Fu around 50 AD.