Factual error: The map shown has U.S. interstates displayed, but the U.S. interstate system wasn't developed until the 1950's. (00:06:30)
Continuity mistake: When we see the guy trying to open the coconut with his bayonet, his blade is either on top of the coconut or digging into the coconut depending on the shot. (00:21:20)
Revealing mistake: Near the end of the battle at the end of the episode, we see some Japanese troops coming out from the jungle. The Marines then shoot a machine gun, killing them. But pay attention to the ammo belt. All the bullets are blanks. (00:38:50)
Factual error: General Alexander Archer Vandegrift, who awards John Bassilone the metal of Honor (MOH), is wearing the MOH ribbon himself. General Vandegrift was not awarded the MOH until 1943, after Sgt. Bassilone. (00:21:26)