The captain states that the time is "23:20 hours," which is 11:20 PM, however, moments before that when the soldiers are outside the tent, the sky is clearly light.
(at around 20 mins) After Scouting the village, McCluskey returns with very modern looking sporting goods arrow (not an 1876 Sioux arrow) stuck in the middle of his lower back. As the men are marching up to the ridge, there is no arrow but it returns in a subsequent shot.
McCluskey believes he killed an Indian after firing his rifle blindly into a dust cloud. However, soldiers are never issued live ammunition while on training exercises thus making that impossible.
McCluskey sees the Native American tepee but calls it a wigwam. A wigwam was a fixed dome-shaped structure, often covered with skins and thatch and of a semi-permanent nature. The tepee was a portable tent structure, with a pointed top, and used as we now use tents for temporary shelter. What McCluskey actually sees is a tepee, not a wigwam.
Captain Dennet refers to the tank as an M4 (also known as a Sherman). However, the tank used is an M3A3 Stuart.
The three main characters are members of a tank crew, but their M3A3 Stuart tank should be served by a four-man crew.
Cpl. Langsford refers to Custer's Last Stand as "an 80 year old battle/" However, it is noted that the story takes place on June 25, 1964, which would have been the 88th anniversary of the battle, which occurred on June 25, 1876.
All the tank crewmen are wearing ammunition belts for the M1 Garand rifle, but none of them are armed with that weapon.
The helmets worn by the tank crew are missing earphones, although they do have the retainers attached.
There is a motorized vehicle speeding by over the shoulder of the character Langsford as he is speaking, 17 minutes 38 seconds from the start.
There is a second speeding vehicle in the background at 23 minutes and 57 seconds into the show.
This episode is supposed to take place at the site of the Battle of the Little Big Horn in southeastern Montana, with gently undulating terrain, but the hilly terrain shown in the episode is clearly that of Southern California. Moreover, there is no mention of the Little Big Horn River, a major geographical feature in the battle.
The three National Guardsmen are supposed to be caught in a time warp sending them back from 1963 to 1876. However, they are still able to communicate with the base commander via radio and the search party that was sent out finds the tank that they left behind, very much in the present.
CPL Langsford is sometimes referred to as "Langford."