Alma 49:8

But behold, to their uttermost astonishment, they were prepared for them, in a manner which never had been known among all the children of Lehi. Now they were prepared for the Lamanites, to battle, after the manner of the instructions of Moroni.

But they were completely shocked. The Nephites were prepared for them in a way that had never been known among all the children of Lehi. They were ready for the Lamanites to battle, just as Moroni had taught them.

But to their absolute amazement, the Nephites were prepared in ways no one among Lehi’s people had ever seen. They were ready for battle exactly as Moroni had taught them.