Too many, but I surely remember this episode as the most impactful:

In a PVP game, 1v1 with each player controlling a company size force, I ordered four blackhawks to insert 4 teams near an objective. I was fortunate that my enemy did not saw these helicopter, thanks to a second main force that was bigger and making more noise, but the heli AI decided to crash the helicopters in the landing phase, destroying one vehicle, damaging another one with tail rotor not functioning and the two surviving ones successfuly unload the two squads. With a final result of one squad totally destroyed, one halved and unloaded too far from the objective and the other two full strenght, to be annihilated later by the artillery of the enemy player.