Background
From a modern military history perspective, Lv Bu's sustained harassment of Xiaopei around the second year of Jian'an (197) was in essence a months-long "attrition-style absorption" — not a single decisive battle, but a gradual squeezing of Liu Bei out of his Xiaopei base through diplomatic maneuvering between Yuan Shu and Cao Cao. The previous year, Lv Bu had just seized Xuzhou, forcing Liu Bei to fall back and hold Xiaopei; the two sides had settled into a typical "reversed principal-guest" stand-off: Lv Bu holding the province, Liu Bei holding the county, barely forty or fifty li apart. That kind of close-range asymmetric confrontation in the late Han almost inevitably led to conflict. Yuan Shu's intervention was the critical variable; he enticed Lv Bu to encircle and attack Liu Bei with a lavish price — "fifty thousand hu of grain, five hundred horses, ten thousand liang of gold and silver, one thousand bolts of colored silk" [c:16495] — transforming a regional contest of mutual suspicion into a proxy war that drew in the entire Xuzhou–Huai theater.
Key Figures
Lv Bu's command style in this campaign differed markedly from the night raid on Xuzhou a year earlier — he was no longer relying on a single-point surprise strike but was attempting multi-line coordination: Chen Gong and Zang Ba moved in the Yanzhou direction to pin down Cao Cao; Gao Shun and Zhang Liao attacked Pei city as the main effort; Song Xian and Wei Xu went west to seize the Ru and Ying rivers to disrupt Yuan Shu's rear communications; and Lv Bu himself led the center as a mobile reserve [c:16496]. This three-pronged simultaneous deployment was among the most systematically organized operations of Lv Bu's entire military career. Gao Shun, as the most assault-capable general under Lv Bu, was the actual breakthrough force for this Xiaopei operation; Zhang Liao showed here the early form of the dominance he would later display at Hefei — he and Gao Shun jointly struck the camps of Guan Yu and Zhang Fei, forcing both armies to collapse simultaneously. On Liu Bei's side, the situation was one of complete passivity: Guan Yu and Zhang Fei each defended a camp, with Liu Bei holding the center as a mobile reserve — structurally reasonable, but the disparity in numbers rendered any response meaningless.
Critical Turning Points
There were two decisive moments in the entire campaign. The first was Lv Bu "sending a division to strike from the rear" — a classic pincer maneuver; Guan Yu and Zhang Fei's front line was cut from behind, causing both columns to collapse simultaneously: "the armies of Guan Yu and Zhang Fei both routed" [c:16497]. The second was Liu Bei's retreat to Pei city, arriving at the city gate at almost the same moment as Lv Bu: the defenders on the wall "wanted to loose arrows but feared hitting Liu Bei," and that instant of hesitation allowed Lv Bu to exploit the opening and charge into the gate [c:16497]. These two details taken together show that the fall of Xiaopei was not simply a matter of numbers — Liu Bei's emergency response system failed simultaneously on three fronts: communications, withdrawal routes, and control of the city gates, reflecting that his organization had not yet attained the maturity of an independent military-political bloc.
Suppression and Outcome
The immediate result of this series of raids was that Liu Bei lost his base for the second time and was forced to seek refuge with Cao Cao. Compared with the loss of Xuzhou a year earlier, the political consequences this time ran deeper: Liu Bei broke with Lv Bu completely and henceforth made "using Cao Cao's hand to eliminate Lv Bu" his next strategic objective. For Lv Bu, taking Xiaopei was a tactical success but a strategic failure — he personally pushed Liu Bei into Cao Cao's camp, giving Cao Cao a legitimate pretext and a guide for an eastern campaign against Xuzhou. Yuan Shu's "promises unkept" in this campaign also made Lv Bu realize how unreliable this self-styled ally of the Son of Heaven was, sowing the seeds for Lv Bu's subsequent raid against Yuan Shu and Yuan Shu's retaliatory counterattack.
Historical Resonance
The Xiaopei campaign — this sequence of three raids — plays an important transitional role in the narrative of the Romance of the San Guo: it ends the transitional period of the false Liu–Lv "alliance" and formally launches Liu Bei onto the trajectory of "attaching himself to Cao to turn against Lv." From the perspective of military history, this was one of the few campaigns in which the Lvbujituan genuinely demonstrated multi-arm coordination, and it was among the defining exploits that established Gao Shun's "Crack Formation" as a legendary unit. Yet at the same time it laid bare the fundamental strategic deficiency of Lv Bu: he could win tactical victories but could not convert tactical victories into political integration — after taking Xiaopei, he neither pursued and annihilated Liu Bei's main force nor promptly repaired relations with Yuan Shu, and was extinguished in the combined siege of Xiapi less than two years later. This chain of raids can therefore be viewed as the last high point of Lv Bu's brief ascendancy.