And as we'll see over time, you have a lot of mixing between the Akkadian language, the Sumerian language. Akkadian gets written in the cuneiform script. And starting at around this period, Sumerian starts to die as a spoken language, and Akkadian really becomes dominant. Now, the Akkadians rule for a little over 100 years. And then you have several other empires. And it can get confusing. The way I've structured this timeline is this top line right over here is southern Mesopotamia, and this bottom line right over here is northern Mesopotamia.