Page "Book of Alma" Paragraph 5

Chapters 17 to 27 describe the missionary labors of the sons of King Mosiah II who was the last king over the people of Nephi prior to the peaceful transition of the nation from a monarchy to a republican form of government.

The sons of Mosiah, named Ammon, Aaron, Omner and Himni, chose to devote themselves to missionary labors preaching to the people of the Lamanite nation, which periodically went to war against the Nephite nation.

They lived and taught among the Lamanites between the years 91 and 77 B. C.