And it came to pass that Moroni caused that his army should be secreted in the valley which was near the bank of the river Sidon, which was on the west of the river Sidon in the wilderness. And Moroni placed spies round about, that he might know when the camp of the Lamanites should come. And now, as Moroni knew the intention of the Lamanites, that it was their intention to destroy their brethren, or to subject them and bring them into bondage that they might establish a kingdom unto themselves over all the land; And he also knowing that it was the only desire of the Nephites to preserve their lands, and their liberty, and their church, therefore he thought it no sin that he should defend them by stratagem; therefore, he found by his spies which course the Lamanites were to take.