Difficulties of an Organizationally Distinct Peace-Keeping Force

With due respect to the notion of an “armed peace corps,” what happens when either a) a peace-keeping situation deteriorates into real war, or b) a real war deteriorates to the point where someone decides to deploy the armed peace corps as a stop-gap? I very strongly suspect that, if such an armed peace corps existed, it would have been deployed to Afghanistan in 2002, and I doubt very much that it could have prevented the re-emergence of the Taliban. Similarly, I suspect that poorly trained “armed peace corps” forces would have found themselves deployed to relatively quiet parts of Iraq during the dark days of 2005, 2006, and 2007.

I certainly think that peacekeeping forces deliver positive value, but the scheme to create an organizationally separate force seems poorly conceived.