<Tr> <Th> Classical antiquity </Th> </Tr> <Tr> <Td> <Ul> <Li> Achaemenid Empire </Li> <Li> Carthaginian Empire </Li> <Li> Delian League </Li> <Li> Bosporan Kingdom </Li> <Li> Kingdom of Pontus </Li> <Li> Greco - Bactrian Kingdom </Li> <Li> Kingdom of Armenia </Li> <Li> Magna Graecia </Li> <Li> Macedonian Empire </Li> <Li> Odrysian kingdom </Li> <Li> Parthian Empire </Li> <Li> Peloponnesian League </Li> <Li> Ptolemaic Kingdom </Li> <Li> Roman Empire </Li> <Li> Roman Republic </Li> <Li> Sassanid Empire </Li> <Li> Hephthalite Empire </Li> <Li> Lakhmids </Li> <Li> Ghassanids </Li> <Li> Kingdom of Aksum </Li> <Li> Seleucid Empire </Li> <Li> Scythians </Li> <Li> Antigonid dynasty </Li> <Li> Palmyra </Li> <Li> Nabataean Kingdom </Li> </Ul> </Td> </Tr> <Ul> <Li> Achaemenid Empire </Li> <Li> Carthaginian Empire </Li> <Li> Delian League </Li> <Li> Bosporan Kingdom </Li> <Li> Kingdom of Pontus </Li> <Li> Greco - Bactrian Kingdom </Li> <Li> Kingdom of Armenia </Li> <Li> Magna Graecia </Li> <Li> Macedonian Empire </Li> <Li> Odrysian kingdom </Li> <Li> Parthian Empire </Li> <Li> Peloponnesian League </Li> <Li> Ptolemaic Kingdom </Li> <Li> Roman Empire </Li> <Li> Roman Republic </Li> <Li> Sassanid Empire </Li> <Li> Hephthalite Empire </Li> <Li> Lakhmids </Li> <Li> Ghassanids </Li> <Li> Kingdom of Aksum </Li> <Li> Seleucid Empire </Li> <Li> Scythians </Li> <Li> Antigonid dynasty </Li> <Li> Palmyra </Li> <Li> Nabataean Kingdom </Li> </Ul> <Li> Kingdom of Pontus </Li>

What two civilizations were important to early greek history