In the intro of Fallout:Brotherhood of Steel it states that there was a disagreement in the brotherhood and that the minority lost and were sent East to investigate. This effectively cut the BOS into 2 different branches. I remember that in Fallout 3 the BOS is in the Washington DC area and they don't tolerate mutants/deathclaws.
Is there any canon/fiction that states what happens when the Chicago BOS comes into contact with Washington DC (original) BOS?
Also, is the Washington DC branch the "original" branch or is there another one?