Operation: ABLE SENTRY

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Operation: PHALANX[1]

Operation: ABLE SENTRY


Human-Covenant War[1]


Between 2526 and 2552[1]


Circinius IV, Circinius system[1]


Operation: ABLE SENTRY was an operation of the United Nations Space Command on Circinius IV during the Human-Covenant War at some point between 2526 and 2552. The operation saw the deployment of a unit of UNSC Marines—including Edward Buck—to provide force reconnaissance for Operation: PHALANX, an operation carried out by Spartan-IIs to evacuate civilians and observe Covenant invasion patterns on the planet.[1]


In Halo 4: Forward Unto Dawn, John-117 tells the survivors of Hastati Squad that they are the only survivors on the planet.[2] As the film is set during the Covenant's initial attack on Circinius IV, the presence of other survivors afterward ostensibly creates a contradiction. However, it can be assumed that Blue Team was operating on limited information at the time, or that the other survivors were only discovered later.

List of appearances[edit]


  1. ^ a b c d e Halo 5: Guardians Limited Edition, Spartan Locke's Classified Orders
  2. ^ Halo 4: Forward Unto Dawn (John-117: "You're the only survivors." Michael Sullivan: "In the school?" John-117: "On the planet.")