Nobility is a Technology that is researched in the Government Center. It can be researched once the player reaches the Bronze Age. 175 Food and 120 Gold is needed to develop this technology. Once this upgrade is researched, all hit points of Cavalry units (except elephants) are increased by 15%. This technology must be researched in order to develop Scythe Chariots in the Iron Age, which is an upgraded version of the Chariot.