Alma 22:34

therefore the Lamanites could have no more possessions only in the land of Nephi, and the wilderness round about. Now this was wisdom in the Nephites; as the Lamanites were an enemy to them, they would not suffer their afflictions on every hand, and also that they might have a country whither they might flee, according to their desires.

The Lamanites could have no more land except in the land of Nephi and the wilderness around it. This was wise for the Nephites. The Lamanites were their enemies. They did not want to suffer hard times from them on every side. They also wanted to have a country where they could run away if they needed to.

This limited the Lamanites to the land of Nephi and the surrounding wilderness. This was strategic for the Nephites—since the Lamanites were their enemies, they didn’t want to be attacked from all sides. They also wanted territory they could retreat to if needed.