Attack helicopters are excellent for combat in wooded areas. The reason they weren't used in Serbia was not because they were ineffective but because Clinton didn't want another Mogadishu - the only bombings done were from 30,000 feet and the Serbians in Kosovo lost only 30 vehicles to it.

It is in the desert that the attack helicopter suffers as it cannot pop out from behind woods and the like as they can in Europe.