Alma 52:23

And it came to pass that the armies of the Lamanites did march forth against Teancum, supposing by their numbers to overpower Teancum, because of the smallness of his numbers. And as Teancum saw the armies of the Lamanites coming out against him, he began to retreat down by the seashore, northward.

The Lamanite armies marched out against Teancum. They thought they could beat Teancum because he had so few men. When Teancum saw the Lamanite armies coming at him, he started running down the coast to the north.

The Lamanite armies marched out against Teancum, thinking they could crush him easily because his numbers were so small. When Teancum saw the Lamanite armies coming at him, he began retreating northward along the seashore.