What Remains

What Remains is one of several short stories in Halo: Fractures - Extraordinary Tales from the Halo Canon.

Official summary
"This story takes place immediately following the mysterious and tragic events that transpired in Halo 5: Guardians on the glassed colony of Meridian - a world that had fallen after a series of unrelenting Covenant attacks that stretched from 2548 to 2551 (Halo 2: Anniversary era), shortly before the end of the war."