Late in this century, Xiang Yu lost the battle of 
Late in this century, Xiang Yu lost the battle of Gaixia to future emperor Liu Bang. The Earth's diameter was first roughly calculated during this century by Eratosthenes. A bloody campaign in the Kalinga province brought a king to pacifism in this century, during which Arsaces I founded the Parthian empire. The doctrine of legalism was developed after a Warring States period ended in this century, during which Ashoka spread Buddhist edicts across India. For 10 points, name this century in which the Qin ("chin") and Han dynasties of China were founded several generations before Christ.
Late in this century, Xiang Yu lost the battle of Gaixia to future emperor Liu Bang.
Third Century BCE [or 200s BCE; or Third Century Before Christ; or Third Century Before the Common Era; or 200s Before Christ; or 200s Before the Common Era; do NOT accept or prompt on "Third Century" or "200s" alone until the last word of the question is read, but accept Third or 200s alone after that] 