郭大 / Guo Da (late Han)
Hanji 939 introduces 郭大 / Guo Da as a Yellow Turban remnant leader connected with the 白波军 rising in Xihe’s Baibo Valley. The episode says his force attacks Taiyuan and 河东郡, making him part of the 188 CE disorder that keeps the central court from treating the Yellow Turban problem as settled.
The page is source-scoped. The input names him as 郭大; the wiki preserves that spelling here rather than normalizing it to another historical form without a later source inside the corpus.