Pang Xun took control of the circuit headquarters, took the title of acting military governor (留後,
Liuhou), and initially sought imperial commission to formally do so. He tried to get Cui Yanzhen's assistant, in Cui's role as the military prefect, Wen Tinghao (), to draft a petition for him requesting imperial commission, but after Wen refused, his strategist Zhou Chong () drafted a petition that was arrogantly worded, in which he threatened further military action against the imperial government if the imperial government did not commission him. Initially, though, the people in Xusi Circuit and the surrounding areas believed that the imperial government would be willing to commission Pang, and therefore, a large number of people in the surrounding origins, including agrarian rebels, went to Xu Prefecture and joined Xu's forces. Pang also sent his officer Liu Xingji () to Hao Prefecture; Li Yuan () to Si Prefecture; and Liang Pi () to Su Prefecture, to take control of those cities. Liu and Liang were able to do so, but Du Tao ambushed and resisted Li, and dug in on his defenses, ready to resist Pang. When the eunuch Kang Daowei () arrived to try to placate Pang and his army, Pang made a demonstration of the strength of his force, and submitted another petition through Kang. Meanwhile, though, he attacked a number of neighboring cities, capturing a number of counties. The imperial government, however, rejected Pang's overtures, as when the imperial edict arrived on December 2, all it declared were the faults of Cui and the eunuch monitor Zhang Daojin () and that they would be demoted. Pang, disappointed, arrested the eunuch delivering the edict. Meanwhile, Emperor Yizong commissioned the imperial guards general
Kang Chengxun to be the military governor of Yicheng Circuit, to oversee the operations against Pang, while commissioning two other imperial guard generals, Wang Yanquan () and Dai Keshi (), to command two side armies to the north and south. At Kang's request, he was allowed to enlist the assistance of the
Shatuo chieftain
Zhuye Chixin, as well as those of the tribal chiefs of
Tuyuhun,
Tatar, and Qibi () tribes. Meanwhile, Pang's forces put Si Prefecture under siege, nearly capturing it. Even though
Du Shenquan the military governor of Zhenhai Circuit (鎮海, headquartered in modern
Zhenjiang,
Jiangsu) and Linghu Tao both sent forces to try to lift Si's siege, both circuits' armies (commanded by Zhai Xingyue () and Li Xiang, respectively) were crushed and annihilated by Pang's forces. While Pang's forces were unable to capture Si Prefecture, they were able to capture a number of other prefectures around the region, including Chu (滁洲, in modern Chuzhou) and He (和州, in modern
Chaohu,
Anhui). Dai tried to recapture Duliang (都梁, in modern Huai'an), where the rebels had crushed Huainan forces, before lifting Si Prefecture's siege. The rebels at Duliang feigned surrender, and then ambushed Dai. Dai's army was also crushed, and Dai was killed. LInghu, concerned that the rebels would attack Huainan next, sent messengers to Pang, offering to request imperial commission for him. Pang therefore suspended further advancements on Huainan, but continued to siege Si Prefecture. To the north, Wang was also repeatedly defeated by the rebels, and was replaced by Cao Xiang () the military governor of Taining Circuit (泰寧, i.e., the new name for Yanhai).
He Quanhao the military governor of Weibo Circuit (魏博, headquartered in modern
Handan,
Hebei), which had been ruled semi-independently from the imperial government, also sent forces to aid Cao. By this point, except for their inability to capture Si Prefecture, Pang's forces were still essentially running into no opposition in their campaigns, but in spring 869, Kang began approaching Xu Prefecture with about 70,000 men, and he stationed himself near the rebel stronghold at Liuzi (柳子, in modern Suzhou). Pang, faced with this huge imperial army and the fact that his own soldiers were spread thin on various campaigns, began to be fearful, and by this point the people were no longer joining him in droves. Further, his army's attacks on Hai (海州, in modern
Lianyungang,
Jiangsu) and Shou (壽州, in modern
Lu'an,
Anhui) were repelled by forces loyal to the imperial government, at heavy losses. Meanwhile, Zhuye distinguished himself in battle, and when the rebel officer Wang Hongli (), who was instrumental in their victory at Duliang, attacked one of the imperial forces' camps at Lutang (鹿塘, in modern
Shangqiu,
Henan), Zhuye's Shatuo soldiers struck back, inflicting heavy losses on Wang. Kang's main forces then attacked Liuzi, and when Yao Zhou tried to relieve Liuzi, Kang defeated him, and when he fled to Su Prefecture, Liang killed him due to their prior personal conflict. == Declaration of independence ==