The Glassing of Minab was a Covenant attack on the outer colony world of Minab in 2550. There was no known resistance put up by the UNSC, and the planet went into a nuclear winter after it was glassed. Notable residents and survivors of Minab are Holly Tanaka.
These events are depicted in the comic Halo: Escalation Issues 17 and 18. Halo: Escalation Volume 3, which covers issues 17 and 18, was the subject of a Halo Book Club on September 6th, 2016.