First of all, the chapter was clearly written so I could picture the action. The general's tactic seem to involve misdirection and the element of surprise. I know little about combat strategies so I can't comment on how acurate the depiction was. What struck me as interesting was the way the general seems to think like a magician. The paterns that I see evolving are as follows.
The general makes things/people apear to be where they are not.
He cleverly changes things that are assumed to be constant. For example, he removes the flag pole.
He makes it apear that there are more people in a place than there realy are.
If he manages to get to the location I imagine that his strategy will involve creating a diversion, hiding in an unlikely spot, and emerging when least expected. Beyond that I can't say much.