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This article is about the real world year. For the in-universe year, see 1999.
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1997 is the year Halo was starting to be developed.[1]
Events
Unknown
Halo started development.[1] It had the codename "Monkey Nuts".[2]
Sources
show Real-world chronology
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Pre-2000
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2000s
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2010s
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>2020s
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