User blog comment:ImperiexSeed/Supernatural Mysteries/@comment-3481504-20130210004157/@comment-3481504-20130213183718

Don't think there's a Garrison plan for Archangels--rather, they seem to stand alone, authoritatively ruling Heaven, in God's absence.

Known (of) Garrisons:

Anna's (but, more accurately, Zachariah's) garrison.

1) Anna (formerly, Boss over said Garrison) 2) Castiel (formerly, overseeing Group Captain) 3) Uriel (something called, "a specialist), which he refers to himself as) 4) Balthazar 5) Rachel (one of, or the, Leutenient, of Castiel's army) 6) Zachariah (likely, the Management of this Garrison, him being a great Seraphim)

Angels of unknown Garrisons:

1)Virgil 2)Joshua 3)Samandriel

The only known Angel that reports to the Archangels directly on the behalf of other Angels, is, in fact, Zachariah.