Lessons Learned is one of several short stories in Halo: Fractures - Extraordinary Tales from the Halo Canon.
- “This story begins on March 29, 2554, more than a year after the end of the Covenant War (Halo 3) - a thirty-year struggle for humanity's survival waged across its embattled colonies - and the subsequent activation of the SPARTAN-IV Program, which would eventually undergird the United Nations Space Command's fledgling Spartan branch (Halo: Initiation).”
- Captain Chu
- Catherine Halsey (mentioned only)
- Kasha 'Hilot
- John-117 (mentioned only)
- Kurt-051 (mentioned only)
- Franklin Mendez
- Captain O'Day
- Hideo Wakahisa
- Hilot (mentioned only)
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