[Nick_K]

Black hawks are rubbish in combat tho, if you were attacking an enemy province they surely wouldn't last long.
If you now own 3 great hawks, but there was no battle report... where are they? Is it possible you selected the wrong province by mistake? Even getting 1 commander in an enemy province should cause a battle. Have you checked the unit list for that province? Black hawks are small & dark so you might have missed them if they're not assigned to commanders.
If there was a battle report, I'd say 'pause it at the start and double check' black hawks die so quickly it's possible they got slaughtered without you noticing.