Here in Mormon 4:8 we find that the Nephites "took possession again of the city of Desolation. We are reminded, with this Nephite retaking of the city of Desolation, that the Nephite-Lamanite series of final battles did not move steadily northward, especially in these years of battle over the city Desolation. [See Appendix A--Chronology]
Geographical [Theory Map]: Mormon 4:7-8 The Nephites Take Desolation Back (364 A.S.--366 A.S.)
Geographical [Theory Map]: Mormon 4:10-14 The Lamanites Retake Desolation and Teancum (367 A.S.)