Angels operate in garrisons, which are units or divisions in The Host of Heaven. Angels collectively contribute to the affairs and take part in activities assigned to their garrison. Every angelic group has its own leaders and supervisors that are separate from Archangels. Zachariah was a direct superior of Castiel, but the garrison to which he belonged was never established.
Whether or not the garrison units remain in place following the derailment of the Apocalypse is unknown. Castiel reveals that Heaven split into smaller factions following the loss of Michael, and there has been significant disorder. Some angels serve as soldiers of Raphael, others try to defend Heaven from them, and still others have left the fight altogether. When Castiel declares himself their new "God", he kills a vast number of angels who served Raphael, and commands the others to learn from this lesson.
Who commands Heaven after Castiel's dethronement is uncertain, but remnants of the garrison system remain.
- Balthazar (Possibly)
- Rachel (Possibly)
- Samandiriel (Possibly)
- Ion (Possibly)
- Esper (Possibly)
- Seven Unidentified Angels
Unit Description: This particular division was formerly managed by Anna. Anna lost her position and ranking in this garrison when she chose to relinquish her grace and fall to Earth, where she was reborn human. Eventually she regained her grace, but she was not allowed back in the Host, although through 'favors' she had her human body resurrected so she could possess it. She later claimed that Heaven let her out so that she could kill Sam Winchester. Castiel was at one time Uriel's supervisor, but he was later demoted due to his growing attachment to Dean Winchester. According to Castiel, Balthazar fought alongside him during the last angelic war. He was believed to have died, but in fact faked his death and took a number of powerful artifacts from Heaven before going to live on Earth.
4.10 Heaven and Hell - Anna Milton is revealed to be an angel who removed her grace, and she informs Dean and Sam Winchester that she used to be a leader in a garrison.
4.16 On the Head of a Pin - Castiel's empathy towards Dean was questioned by his superiors. His superiors temporarily give the angel Uriel command over Castiel. Uriel is revealed to be a Fallen Angel who is murdering members of the garrison who don't agree to join him in rasing Lucifer. He is killed when Anna returns and uses his own Angel Killing Sword against him.
4.17 It's a Terrible Life - Zachariah reveals himself as Castiel's superior, and suggests that he is also responsible for what happens with Dean and Sam.
4.20 The Rapture - Castiel engaged in an angel on angel battle with some of his superiors. After this angelic battle, Cas was taken up to Heaven for teachings on obedience, leaving his vessel, Jimmy Novak, unconscious where he was found by Sam and Dean. When he returns, he appears obedient to Heaven's orders. Apparently Cas wanted to warn the Winchesters about Zachariah's plan to allow the Apocalypse to continue, which ultimately resulted in the freeing of Lucifer.
4.21 When the Levee Breaks - Castiel aids in Anna's capture.
5.13 The Song Remains the Same - Anna manages to escape from Heaven, and goes back in time in an attempt to prevent Sam's birth. Once there, she gives orders to a younger Uriel on the pretense of being his superior in the future as well as the past. She is eventually destroyed by Michael.
5.18 Point of No Return - Zachariah is removed from his position, but reinstated on condition that he at last make Dean consent. Dean kills him.
5.22 Swan Song - After Michael is trapped, Castiel returns to Heaven, speculating that chaos will reign in the absence of Heaven's leader.
6.03 The Third Man - Balthazar has left Heaven and his position to explore life on Earth. The angels are at war.
7.21 Reading Is Fundamental - The angels Inias and Hester come to Earth to find the prophet Kevin Tran, and discover that Castiel is still alive, though insane. Hester is furious when the Winchesters banish them, delaying their mission. She takes her anger out on Castiel at their next encounter, beating him, and reproaching him for the killing and the chaos. As she is preparing to stab him, she is herself killed by Meg. Inias takes command of the lesser angels assigned to the prophet, and asks Castiel to join them. Cas replies that he is no longer part of the garrison. Later, two angels escort Kevin to his home and are killed by the Leviathan Edgar with ease.
7.23 Survival of the Fittest - Castiel visits Sam and Dean with Meg's help and reveals that he has discovered that the garrison has been wiped out by the Leviathans. If any angels survived, they are now in hiding.