And it came to pass that the Lamanites began to come in upon his people, upon small numbers, and to slay them in their fields, and while they were tending their flocks. And king Noah sent guards round about the land to keep them off; but he did not send a sufficient number, and the Lamanites came upon them and killed them, and drove many of their flocks out of the land; thus the Lamanites began to destroy them, and to exercise their hatred upon them.