All true tactical masters understand a simple principle: if there are no flaws, it means there are flaws everywhere. Unless you have an absolute advantage in numbers, dispersing your forces is inherently a serious problem.
The so-called numerical advantage here is not simply defined by quantity; it represents an absolute advantage in combat power, the ability to defeat the opponent.
Felix divided his forces into three parts, which in itself greatly wasted the so-called "forces" he had, making it impossible to gain a numerical advantage over the Tang Army.
However, from a stability standpoint, his plan at least satisfied several countries: as long as the defensive lines held, organizing a local counterattack was a natural course of action.
After all, they couldn't just keep defending passively, could they? The Great Tang Empire can afford to wait, but these countries that are getting attacked cannot.
