There isn't any Donetsk People's Republic, officially. Which would imply that D0N is an unlicensed operation. Still a cool and unusual catch, and cool contact.
Closest I hear on any ham band to Ukraine is Poland, or sometimes Russia.
I'll have to listen more closely to the CW portion of the 20 meter band.
Was the station sending in English CW, or Cyrillic? Was it very fast?