What do we do after we secure Baghdad?

Question

Baghdad is just a small part of Iraq? We spend 12 billion a month to secure a small section of the country just imagine how much it would cost to secure the entire country.

Answer 1

Secure today, unsecured tomorrow. The insurgents have the popular support and they will make things as expensive to the invader as necessary to make him go home.
That is the story of practically all similar occupations of the last 100 years. The occupier finds the cost of staying greater than the benefits derived.