Covenant of Peace

20 And it came to pass that Moroni caused that the work of death should cease again among the people. And he took the weapons of war from the Lamanites; and after they had entered into a covenant with him of peace they were suffered to depart into the wilderness (Alma 44).

Did they keep their covenant of peace? I wonder if there is any way to find out, any scripture that would indicate yes or no. We know that in not many years after this conflict, the Lamanites again came attacking and they were in a state of war for many years. But what about the people who made this covenant of peace? Did they stay true to it?