Book of Han: Xiang Yu proclaimed himself Hegemon-King of Western Chu and made Pengcheng his capital; breaking his pledge, he made the Duke of Pei…
Xiang Yu proclaimed himself Hegemon-King of Western Chu and made Pengcheng his capital; breaking his pledge, he made the Duke of Pei King of Han, with the forty-one counties of Ba, Shu and Hanzhong and the capital at Nanzheng.
羽自立為西楚霸王，王梁、楚地九郡，都彭城。背約，更立沛公為漢王，王巴、蜀、漢中四十一縣，都南鄭
Location: 漢書卷001 漢高祖元年二月
Xiang Yu divided the world, set up feudal lords, made himself Xichu Hegemon-King, governed nine commanderies and made Pengcheng his capital.
項王自立為西楚霸王，王九郡，都彭城。
Location: 史記卷007 項羽本紀