Colombia crisis 1948

[Brian]

Hi guys

Colombia 1948 is not my normal area of research, so I hope someone can help me, please. Is the following historically correct?

Following the assassination of the pro-communist opposition leader (by the CIA?) in April 1948, civil conflict erupted in Colombia. I believe the embryonic Colombian Air Force had US-provided P-38s, B-25s and B-26s but not experiened crews to fly them and therefore, with American help (CIA?), recruited mercenaries including US, Canadian and German pilots.

Did the communist side have any aircraft? If so, were there any clashes? If not, what were the mercenary pilots required to do? Ground attack?

Any assistance will be greatly appreciated.
Cheers
Brian