How did the rulers during the Achaemenid dynasty organize the vast Persian empire? By 99040417 558 BCE imperial system was started Period: 558 BCE to 330 BCE Achaemenid Empire Period: 558 BCE to 530 BCE Cyrus the Achaemenid 546 BCE Darius issued standardized coins 530 BCE Cyrus's realm was divided into 23 satrapies Period: 530 BCE to 522 BCE Cambyses 525 BCE Cambyses conquered Egypt which brought wealth into Persia Period: 521 BCE to 486 BCE Darius 520 BCE Darius built a new capital at Persepolis 520 BCE Darius standardized the law 500 BCE Royal Road was built Period: 500 BCE to 479 BCE Persian Wars 334 BCE Alexander of Macedon invaded Persia Period: 323 BCE to 83 BCE Selucid empire Period: 305 BCE to 281 BCE Reign of Seleucus Period: 247 BCE to 224 Parthian empire 238 BCE Parthian Satrap revolts against Seleucid overlord 171 BCE Mithradates I comes to the throne 155 BCE Mithradates I consolidates his hold on Iran and extends Parthian rule to Mesopotamia Period: 100 to 500 Buddhism, Christianity, and Manichaeism find numerous converts Period: 224 to 651 Sasanid empire Period: 239 to 272 Reign of Shapur I