Conn Iggulden said this quote

Those who cannot conquer must bend the knee. They must find strength, or serve those of us who have. You are my generals. I will send you out: my hunting dogs, my wolves with iron teeth. When a city closes its gates in fear, you will destroy it. When they make roads and walls, you will cut them, pull down the stones. When a man raises a sword or bow against your men, you will hang him from a tree. Keep Karakorum in your minds as you go. This white city is the heart of the nation, but you are the right arm, the burning brand. Find me new lands, gentlemen. Cut a new path. Let their women weep a sea of tears and I will drink it all.