Alma 44:16 - 44:20
Alma 44: 16 Now it came to pass that Zerahemnah was exceedingly wroth, and he did stir up the remainder of his soldiers to anger, to contend more powerfully against the Nephites.
Zerahemnah now became even more angry and tried to motivate his troops to fight even with more fury against the Nephites.
Alma 44: 17 And now Moroni was angry, because of the stubbornness of the Lamanites; therefore he commanded his people that they should fall upon them and slay them. And it came to pass that they began to slay them; yea, and the Lamanites did contend with their swords and their might.
Moroni was also infuriated with Zerahemnah and now commanded his forces to wade into the Lamanite and kill all the resisted them. The Lamanites tried to fight back with all their physical powers.
Alma 44: 18 But behold, their naked skins and their bare heads were exposed to the sharp swords of the Nephites; yea, behold they were pierced and smitten, yea, and did fall exceedingly fast before the swords of the Nephites; and they began to be swept down, even as the soldier of Moroni had prophesied.
But they were no match for the Nephites. Because of the personal body protection of the Nephites and because the Lamanites were almost completely naked, the Lamanite soldiers were being slaughtered with the sharp swords of the Nephites. They were being killed in large numbers as one of Moroni’s soldier had predicted.
Alma 44: 19 Now Zerahemnah, when he saw that they were all about to be destroyed, cried mightily unto Moroni, promising that he would covenant and also his people with them, if they would spare the remainder of their lives, that they never would come to war again against them.
When it was apparent to Zerahemnah that they would all be killed in battle if they did not comply with Moroni’s demand, Zerahemnah cried out to Moroni for quarter. He said he would agree to the terms if the Moroni would stop the fighting.
Alma 44: 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.
Moroni stop the onslaught of the Nephite soldiers. Moroni tool all the weapons of the Lamanites and covenanted to never come again to invade Nephite lands. The Lamanite survivors were then allow to depart and made their way into the wilderness.