AP World Units 1+2 By kellibeard 3500 BCE Mesopotamia 3100 BCE Egypt 2500 BCE Indus Valley 1800 BCE Shang Period: 1122 BCE to 258 BCE Zhou Dynasty Period: 800 BCE to 338 BCE Greek city-states Period: 550 BCE to 330 BCE Persian Empire Period: 509 BCE to 27 BCE Roman Republic Period: 322 BCE to 185 BCE Mauryan Empire Period: 221 BCE to 206 BCE Qin Dynasty Period: 202 BCE to 220 Han Dynasty Period: 27 BCE to 476 Roman Empire Period: 320 to 550 Gupta Empire