Stirrups weren't as bad as the repeating cross bow used in the Coliseum or the Roman soldiers who were wearing Blue Jeans
The original Spartacus had several scenes where you could see wristwatches on some of the slaves, and for lack of sandals they had desert boots with “straps” painted on them.
BLUE JEANS?!! What? You saw Roman soldiers wearing Blue Jeans in 300? Hah! I definitely overlooked that one, as did the technical advisors. Well, if they did commit that historic faux pas, rest assured those probably were NOT Mom Jeans.