Lt. Dunbar and Lt. Elgin didn't recognize each other? (Spoilers)
How is it that they did not recognize each other?
At Fort Hayes, right before Lt. Dunbar gets his orders from Major Fambrough, they both salute each other and that's when Lt. Dunbar asks where he could find Major Fambrough.
At Ft.Sedgewick, Elgin was asking Dunbar why was he out of uniform and what was he doing there. Dunbar said that this was his post and Elgin replies, "do you have proof of that?" Dunbar tells him that his orders are in his journal on his bunk.
Seems kind of strange that they didn't acknowledge each other.