The ultimate goal? From the first link:
Commanders say the outposts have allowed them to reduce the number of insurgents and the frequency of their attacks as they “compress” the enemy into the city’s center, which some officers call Ramadi’s “heart of darkness.”
If the enemy is being compressed and not scattered, at what point do the surviving enemy try a do-or-die attack to bust out and escape being compressed into an area too small to hide in?
Remember, the enemy wants to win, too.