Alma 47:5

And now he had got the command of those parts of the Lamanites which were in favor of the king; and he sought to gain favor of those which were not obedient; therefore he went forward to the place which was called Onidah, for thither had all the Lamanites fled; for they discovered the army coming, and supposing that they were coming to destroy them, therefore they fled to Onidah, to the place of arms.

He got command of the Lamanites who were on the king’s side. He tried to win over those who did not obey. He went to a place called Onidah. All the Lamanites had run away to that place. They saw the army coming and thought they were coming to destroy them. So they ran to Onidah to the place where they kept their weapons.

Now he commanded the king’s loyalists, and he intended to win over those who’d disobeyed. He marched toward a place called Onidah, where all the reluctant soldiers had fled. They’d seen the army coming and assumed it meant to destroy them, so they’d retreated to their stronghold.