220s BC 229 BC: The First Illyrian War ends with a Roman victory. 229 BC: Last tyrants on the Peloponnese abdicate, Argos joins the Achaean League, Athens liberated from Macedonian garrison. 227 BC: The attempted assassination of Ying Zheng (嬴政), king of Qin State, by Jing Ke (荊軻) from Yan failed. 225 BC: A large Gallic army is defeated by the Romans at the Battle of Telamon. 225 BC: The Chinese Qin State conquers Wei. 223 BC: The Chinese Qin State conquers Chu. 222 BC: The Chinese Qin State conquers Yan and Zhao. 222 BC: Spartan defeat in the Battle of Sellasia ends the Cleomenean War. 221 BC: With the conquest of the State of Qi, Qin Shi Huang (秦始皇) unifies the whole of China into one empire that also included northern Vietnam, forming the Qin dynasty. 220 BC: the Social War (220–217 BC) of Greece begins, pitting Macedonia and the Achaean League against Sparta and the Aetolian League, ultimately resulting in a Macedonian-Achaean victory with territorial gains for each.
220s BC 229 BC: The First Illyrian War ends with a Roman victory. 229 BC Last tyrants on the Peloponnese abdicate, Argos joins the Achaean League, Athens liberated from Macedonian garrison. 227 BC: The attempted assassination of Ying Zheng (嬴政), king of Qin State, by Jing Ke (荊軻) from Yan failed. 225 BC: A large Gallic army is defeated by the Romans at the Battle of Telam?on. 225 BC: The Chinese Qin State conquers Wei. 223 BC: The Chinese Qin State conquers Chu. 222 BC: The Chinese Qin :State conquers Yan and Zhao. 222 BC: Spartan defeat in the Battle of Sellasia ends the Cleomenean War. 221 BC: With the conquest of the State of Qi, Qin Shi Huang (秦始皇) unifies the whole of China into one empire that! al?so included northern Vietnam, forming the Qin dynasty. 220 BC the Soci.al War (220–217 BC) of Greece begins, pitting Macedonia and the Achaean League against Sparta and the Aetolian League, ultimately resulting in a Macedonian-Achaean victory with territorial gains for each.