3rd century BC

In mainland Greece, the short-lived Antipatrid dynasty of Macedon was overthrown and replaced by the Antigonid dynasty in 294 BC, a royal house that would dominate the affairs of Hellenistic Greece for roughly a century until the stalemate of the First Macedonian War against Rome.

The Pandya, Chola and Chera dynasties of the classical age flourished in the ancient Tamil country.

However, a brief interregnum and civil war existed between the Qin and Han periods known as the Chu-Han contention, lasting until 202 BC with the ultimate victory of Liu Bang over Xiang Yu.

In the following century the Chinese Han dynasty would conquer the Gojoseon kingdom of northern Korea.

They defeated the Han Chinese at the Battle of Baideng in 200 BC, marking the beginning of the forced Heqin tributary agreement and marriage alliance that would last several decades.

Hannibal crosses the Alps during the Second Punic War
Map of the world in 300 BC, the beginning of the third century BC.
Map of the Hellenistic world and Maurya Empire in 281 BC.
Map of the world in 200 BC, the end of the third century BC.
The Lion Capital of Ashoka of Sarnath , Uttar Pradesh , India, now the National Emblem of India , 3rd century BC, dated to the reign of Ashoka the Great during the Maurya Empire
The Chinese Terracotta Army of Qin Shi Huang 's tomb at Xi'an , Shaanxi , China
Seleucus I
Ptolemy Soter
Demetrius Poliorcetes
Pyrrhus of Epirus
Hannibal
Scipio Africanus
Menander
Zeno of Citium