Factual error: Listening to a radio broadcast, live, since no other indication is given, Joe Louis is completing the 12th round of a fight. This is December 6, 1941. Joe's last fight of 1941 occurred in September, his next fight was January 1942. (00:00:10)
Continuity mistake: When the German NCO begins to walk up the sand dune he has a stick grenade in his right boot. Next shot half way up the dune, the grenade has changed boots.
Factual error: In the ambush-on-the-prison scene, one of the Boers is equipped with a Lee-Enfield CLLE Charger-Loading Rifle. Although the Boers used many captured Lee-Enfield and Lee-Metford rifles, the CLLE's weren't even developed until the Boer War had ended.