And we talk about them when we talk about Mesopotamia. And you see Kassite Babylonia right over here. The Kassites took over after the Amorites under Hammurabi and his dynasty. And we'll see that they also have a connection to the Hittites. So this will hopefully acquaint you with time. These are Bronze Age civilizations. The state of the art of technology for most of them was bronze, which is combining copper and tin, and you can make weapons and tools and jewelry with it.