So you see from 550, 549, all the way to 530, I have it yellow and that's because Cyrus the Great was in charge of what is called the Achaemenid Empire, or I guess you could say this first great Persian Empire. What I have down here is the best information I could find on the lifespans of these people. And when I have these dotted lines at the beginning, that's when it's unclear when these people were born. So there's different accounts that Cyrus the Great might have been born in 575 BCE, he might have been born closer to 600 BCE, and so that's why I have these dotted lines. Similarly, we don't know exactly when Cambyses II was born, but we do know that he took control in 530 BCE, and so that's why you see Cambyses, you see this line right over here turn blue. And actually Cambyses ends up dying in 522, so let me actually, this should be like that, there you go. He ends up dying in 522, but before he dies in 522, he is able to conquer Egypt in 525 BCE, so right around there.