Xiang Liang
Between 209 BC and 206 BC, rebellions erupted throughout China to overthrow the Qin dynasty. Some of these insurgent forces claimed to be restoring the former six states which were annexed by the Qin state in a series of wars from 230–221 BC. Liu Bang and Xiang Yu were two prominent leaders who emerged from among the rebels. In 208 BC, Xiang Yu and his uncle Xiang Liang installed King Huai II as the nominal ruler of the Chu state while they were actually the ones in power. In late 208 BC, Xiang Liang was killed in action at the Battle of Dingtao so the Chu military came under King Huai II's control. King Huai II sent Xiang Yu and Liu Bang to lead two separate forces to attack the Qin heartland of Guanzhong, and promised that whoever entered that region first would be granted the title of "King of Guanzhong".