most of the times it is a success like Panama or Serbia.

Old Guy, maybe you ought to take a look at this site. It has an interesting take on our "successes". In particular, you'll want to check out what "Smedley Darlington Butler...one of the most decorated soldiers in the history of the Marine Corps and recipient of two Medals of Honor and the Distinguished Service Medal" has to say about it all. (You'll have to scroll waaaayyy down near the bottom to find that part.)

Black Arabs and Bandit Kings