Alma 56

46 For as I had ever called them my sons (for they were all of them very young) even so they said unto me: Father, behold our God is with us, and he will not suffer that we should fall; then let us go forth; we would not slay our brethren if they would let us alone; therefore let us go, lest they should overpower the army of Antipus.
47 Now they never had fought, yet they did not fear death; and they did think more upon the liberty of their fathers than they did upon their lives; yea, they had been taught by their mothers, that if they did not doubt, God would deliver them.
48 And they rehearsed unto me the words of their mothers, saying: We do not doubt our mothers knew it.

These 2,000 young men (Helaman says that they were all of them very young - we could speculate on their youth, but we know from the text that they had never fought) had great faith instilled in them by their mothers. Mothers have power to build a generation of faith or of doubt. President Harold B. Lee said the following:

"A mother’s heart is a child’s schoolroom. The instructions received at the mother’s knee, and the parental lessons together with the pious and sweet souvenirs of the fireside, are never effaced entirely from the soul.

Someone has said that the best school of discipline is the home, for family life is God’s own method of training the young, and homes are largely what mothers make them."
(The Teachings of Harold B. Lee, 289)