Helicopter armor

[Firestorm]

I don't use helos very often, but when I do I tend to use them the same way I use horse cavalry in WinSPWW2: fast, potent but fragile offensive force. You use them as a mobile reserve to deal with enemy breakthroughs and other trouble spots, you send them behind the lines to bash the enemy's artillery park, or you use them at the end to corral and finish off a broken force.

I just thought it was natural for them to die quickly when a still-potent force starts shooting at them. I guess not.