"In preparing the psychological attack on a city, Genghis Khan began with two examples of what awaited the people. He offered generous terms of surrender to the outlying communities, and the ones that accepted the terms and joined the Mongols received great leniency. In the words of the Persian chronicler, "whoever yields and submits to them is safe and free from the terror and disgrace of their severity." Those that refused received exceptionally harsh treatment, as the Mongols herded the captives before them to be used as cannon fodder in the next attack."