公孙瓒
Little is recorded about Tian Kai in history. He probably started his career as a subordinate of the warlord Gongsun Zan in the Eastern Han dynasty. In the second half of 191, when war broke out between Gongsun Zan and his rival Yuan Shao, Gongsun Zan sent Tian Kai to seize control of Qing Province, which was then under Yuan Shao's control. Tian Kai was appointed as the Inspector of Qing Province in 192. However, Tian Kai only managed to gain control over the northern part of Qing Province, while the southern part remained under the control of Yuan Tan, Yuan Shao's eldest son. The next year he was driven out of Qing. In 193, Gongsun Zan and Yuan Shao agreed to a truce after two years of battles against each other.