In Aztec warfare, most cities were conquered fairly quickly. Hassig tells us: “Some wars were quite long, but these were either flower wars or battles against cities that were sufficiently close that troops could be easily resupplied and reinforced. Most battles to conquer single cities lasted for relatively short periods. The length of wars depended on such factors as distance to the objectives, logistical difficulties, and differential strength. But the intensity of interest in conquering the objective was also a factor.”
In this case, Shiz has already demonstrated how highly he desires this goal. This will be a fight to the finish.