Halo Master Chief John 117. Spartan II John 117. Master Chief Petty Officer Halo Master Chief, Master Chief And Cortana According to Halopedia, he's most commonly called SPARTAN-117 or Sierra 117 as his callsign John doesn't actually remember his childhood or his parents, Halopedia explains.
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The Master Chief is the primary playable protagonist of every mainline Halo video game. Master Chief Petty Officer John-117, colloquially known as Master Chief, is the protagonist of the Halo video game series and its spin-off media
The 75 Spartans became a closely-knit family, uniting around their shared experiences, and they were routinely placed against the UNSC's best Marines in. Master Chief Petty Officer Spartan John-117 is a Spartan-II supersoldier and savior of mankind through his actions during and after the Human-Covenant War. Master Chief Petty Officer John-117 is a Spartan-II supersoldier in the United Nations Space Command
Image John117 H2A transparant.png Halo Nation Fandom powered by Wikia. Master Chief Petty Officer Spartan John-117 is a Spartan-II supersoldier and savior of mankind through his actions during and after the Human-Covenant War. Master Chief Petty Officer John-117, also known as simply the Master Chief, is the main protagonist of the Halo franchise
. He is an Spartan-II commando of the UNSC Naval Special Warfare Command who became one of the most important UNSC heroes during the Human-Covenant war Officially designated " John-117, " the boy who would become Halo 's iconic Master Chief underwent an intense training regime - one focused as much on developing his tactical skills and reasoning powers as it was on his physical attributes