Sun Zu's book was about studying an opponent, measuring yourself, and use violence as a last measure, only if it gains advancement.
Now only one tactical battle of General Sun Zu is portrait with some CGI and a little reenactment.
The narrator suggest to the viewer, that our modern military is at the height of Sun Zu;s teaching, and most lessons have been applied.
Perhaps in technology and tactics this could be true. Now Sun Zu was also teaching, that a conflict is not over, until a longer lasting peace with having won over the hearts and minds of the conquered is been accomplished. The flag-waving notions of the narrator struck me as annoying, by his use and ignorance over modern foes. Sun Zu :"Arrogance paired with ignorance, will be the beginning of the End"