Alma 62:42

And it came to pass that after Moroni had fortified those parts of the land which were most exposed to the Lamanites, until they were sufficiently strong, he returned to the city of Zarahemla, and also Helaman returned to the place of his inheritance; and there was once more peace established among the people of Nephi.

After Moroni had made the parts of the land most open to the Lamanites strong enough, he went back to the city of Zarahemla. Helaman also went back to his home. Peace was set up again among the people of Nephi.

After Moroni had fortified the areas most vulnerable to Lamanite attack, he returned to Zarahemla. Helaman returned to his home as well. Peace was restored among the Nephites once more.