Guo Dong and Hui An became part of the battle ranks;
First, because of the battle at East Mountain Fort, when Lord Zheng planted his command flag there and pushed the command chariot forward, although the long-duration battle eventually crushed the Chu army, the losses and casualties on their side were also significant;
Of course, that's not the main reason. The real reason is the influx of high-quality troops personally vetted by Jin Shuke and the blind man from the rear, triggering the expansion of the original Snow Sea army.
It's akin to rewarding accomplishments: old soldiers become squad leaders, squad leaders become sergeants, sergeants become Centurions, Centurions become captains.
