Hist 110B was a really cool class. If you have no prior knowledge about the Parthian or Achaemenid empires, Mousavi will give you all the background information you need to know. This class was pretty easy. You don't need to do any of the assigned readings, but you do need to go to lecture every day to fill out his sign-in sheet. Plus, all the info you need to know is in his lecture slides, and he's mostly clear about concepts. Sometimes he wasn't chronological about his lectures, so studying often involved figuring out how the historical timeline looked. Overall, this is an easy class and if you put in an ounce of effort you'll do fine.