Although the attacking Indians are supposed to be Apaches, they are wearing the feathered headdresses and war bonnets more typical of those worn by tribes of the Great Plains such as the Sioux, rather than the tribes of the southwestern deserts like the Apaches. The only head gear Apaches usually wore were bandanas.
On many of the outdoor scenes when the actors speak there is a slight echo that makes it obvious that the scenes were filmed on a sound stage.