The 7th is Made Up of Phantoms - I just noticed...
When the men are discussing the Battle of the Little Bighorn, they reference the name Benteen, referring to Captain Frederick Benteen.
I just realized that this is the same last name of the leader in "On Thursday We Leave for Home" - "Captain" William Benteen. Did Serling borrow this name from history? Was he making some sort of analogy?