Jehovah
Jehovah — the covenant God of Israel, the premortal Christ
Therefore we did pour out our souls in prayer to God, that he would strengthen us and deliver us out of the hands of our enemies, yea, and also give us strength that we might retain our cities, and our lands, and our possessions, for the support of our people. Alma 58:10–11
'The Lord our God' who answers the prayers of a starving army is Jehovah, the premortal Christ. He speaks peace to their souls and makes Himself the object of their hope ('our deliverance in him'), which is how the Savior still answers prayer.
How we know: Jehovah is the premortal Christ (Abraham 1:16; D&C 110:3–4)
