I’m not sure that we’ve learned it but we should have done.
If there is a problem in another country then go in, remove the problem,do the best you can to make it V.difficult for the problem to rearise and then leave.Do not take over the whole country.
We went to war ostensibly to take out the threat of W.M.D. we should have located them or where they were likely to be and took out those sites.
Always supposing that they had existed in the first place of course.
As you are actually conquering territory(and not afterwards or in this case never)secure all captured arm dumps,weapons from surrendering soldiers and destroy soonest.
This may or may not slow down the advance but it will lessen the odds of the post victory conflict dragging on for years.
The allies are currently being killed by weapons and explosives that they took in the war but just left lying around for anyone to help themselves.
Secure art treasures as WELL as money/gold reserves etc. during the advance.
Immediate Post victory control external borders to limit smuggling and infiltration.
Do NOT dismantle all the organs of the previous government but use them,educate them,control them.
Wherever possible use local proxy troops,use the absaloute minimum of your own troops (more troops make more targets but are not necessarily that much more effective)and keep them V.V low profile and preferably as far away from the media as possible.
Its exciting,brave and noble fighting the Great Satan but less so your own people.
Dont keep troops in areas where they aren’t actually achieving anything just to establish a presence.
There are some very highly trained,very brave soldiers in parts of Afghan who are achieving nothing and due to the local circumstances CANNOT achieve anything,but they are there with some woolly brief about winning hearts and minds.
What they ARE doing is supplying the local Jack the Lads with targets and a meaning to life.
Their successes are basically killing some Mujas when they get ambushed which is offset by their own losses and doesn’t win over or impress the locals.
And finding some small,arms caches.
I’m most definitely not an airy fairy pacifist but those men are dying for very little good reason.
And finally,though it may offend some western liberals who think that people throughout the world can only be happy if they have the same political system as us dont take out dictatorships just because they’re dictatorships.
Just because someone lives in a dictatorship it doesn’t mean that they are necessarily long suffering angels themselves.
The average Iraqi is living in hell(Those who are still living of course)compared to the life they led under Saddam,and yes I do believe that he was a sick evil bastard.
And is the world a safer place because of that war?
Safer?
The same?
More dangerous?
Or a hell of a lot more dangerous?