- After a decade of peace, the Lamanites gather a gargantuan army, advance towards the northern land, and begin to wipe out the Nephites.
- The Lamanites march to Desolation, where a terrible battle ensues; the Nephites are driven out of Desolation, and retreat to a city called Boaz, where despite Lamanite attacks, they are successful in holding their ground.
- The Lamanites make a second strike on Boaz, where they overtake the Nephites, and again sacrifice women and children to idols.
- Mormon, now 65 years old and seeing that the Nephite nation is on the brink of collapse, goes to the hill Shim, where he takes all the Nephite records.