The steel ducks are one of the armored vehicle used by the minigunman army in their missions of conquest. They are known for their amphibious characteristics that allow them to be used in maritime and ground campaigns. They are of the behemoth type and as so they are very useful both in siege and in engaging infantry or ships of an enemy armada. They are not as new or common as other behemoths but find a new use in the more recent years of book 4.