Factual error: When Ulysses opens his mouth while speaking, modern dental fillings are in his teeth.
Factual error: When Doug and Tony recount the causes of the Trojan War, they mention three Roman goddesses - Venus, Juno, and Minerva - instead of using their Greek names - Aphrodite, Hera, and Athena.
Factual error: The battle scenes show the Greek and Trojan cavalry troopers equipped with stirrups on their saddles. The stirrup would not be used until nearly 1,400 years later.
Factual error: This is one of two episodes in the series where a WW2-era German MP38/40 submachine gun was used by American forces (Master Sergeant Jiggs, in this episode) rather than an American weapon such as a Thompson submachine gun.
