Cao Mengde's days were not going too well; the recent shortage of food supplies was somewhat serious. However, having heard from Xun Yu that the grain in Lub Kingdom was about to ripen, he decided to take a leaf out of the Yellow Turbans' book, but he wouldn't be as foolish as they were, leaving not an inch of land untouched. Cao Cao wanted to secure a grain-producing territory for himself. It didn't need to be very large; it just needed to ensure that his soldiers had enough food to eat.