Ding Yuan , courtesy name Jianyang, was a regional governor and minor warlord during the late Han Dynasty period of Chinese history. In 189, both he and Dong Zhuo were summoned into the capital Luoyang with their individual troops to assist in the struggle against the powerful eunuch faction. Ding Yuan, however, was eventually killed by his trusted aide L Bu, who had been bought over by Dong Zhuo.
According to the Records of Heroes by Wang Can, Ding Yuan was born in a poor family. Uncouth but brave, he was adept in horse riding and archery. During his early career as a county magistrate, he never turned away from his responsibility no matter the adversity or risk. He always pitched himself in front during confrontations with fugitive criminals and bandits. He was eventually promoted to Inspector of Bing Province when he met L Bu. The martial prowess of the young warrior greatly impressed Ding Yuan, who made him Chief Secretary and kept him close at side.
Source: Wikipedia