He Jin secretly plotted with Yuan Shao and others to eliminate Jian Shuo and the eunuch faction in the imperial court.
By the time Dong Zhuo entered Luoyang, He Jin had been assassinated by the eunuchs, so Yuan Shao took charge of the Army of the Western Garden.
In revenge, Yuan Shao and his colleagues led troops into the palace and slaughtered the eunuchs.
Emperor Shao and his younger half-brother, the Prince of Chenliu, escaped from the palace during the chaos and were later found by Dong Zhuo and brought back to Luoyang.
Dong Zhuo also seized the opportunity to monopolise state power and dominate the central government.