Alma 49:9

And it came to pass that the Lamanites, or the Amalickiahites, were exceedingly astonished at their manner of preparation for war.

The Lamanites, or the Amalickiahites, were amazed at how prepared the Nephites were for war.

The Lamanites—or Amalickiahites, as some were called—couldn’t believe the level of preparation they were facing.