After a day long battle, "the two armies [rest] by the sea". Teancum and an unnamed aide then infiltrate the Lamanite camp and Teancum kills Amalickiah in his sleep. This leads to a Lamanite withdrawal and retrenchment, pausing the invasion.
After a long battle, the two armies rested by the sea.  Teancum and an unidentified assistant infiltrated the Lamanite camp and killed Amalickiah while he slept. This caused the Lamanites to retreat, halting their advance.