The County in Maine is Aroostook, which is bigger than 2 of the other New England states and almost as big as the other 3.
The Embassy is "the diplomatic delegation from one country to another. Embassy is often used to refer to the chancery – containing the office of the chief of mission, or ambassador – and other buildings for the offices of diplomatic staff." (Definition from the US State Department's website.)
Not weird that a word changes meaning, it happens all the time things evolve in different directions, just in this case. I guess because you can still see what it means. (In other cases the origin of a word might be more obscure or more subjective like nice, so the word could step by step meaning something else. I think in this case it happened quite abruptly and started out more as a mix up)
Kept trying erudite instead of eloquent.bother.