Helicopters are inherently unstable by design. They simply do not want to fly which is the exact opposite of fixed wing aircraft. That being said, While the controls appear to very similar to a piston or jet driven airplane, their functions act quite differently (and sometimes in complete opposition to each other).
The main control stick controls the tilt of the aircraft, the pedals the horizontal rotation of the craft by the tail rotor, while the throttle (called a cyclic) controls the pitch and rate of speed of the main rotors, so unlike a normal airplane, controlling a Helicopter can be physically more demanding as often your entire body is in motion especially during tricky maneuvers. On a side note the UH/HH-60 aren't that dangerous. Both the AH-64 and the HH-60 are designed to counter rotate in the event of main power failure in an effort to lessen damage to the crew on board as well as have various other design features.
Still freak accidents happen. Lose a rotor and nothing you will do will save you or the craft in question, or even a tail rotor. Honestly, The most losses for Helicopters by type is the aged UH-46 Chinook Helo's, Most of these are Combat losses due to enemy action rather than pilot error.
So you would need to separate Combat losses from actual mechanical failure or human error to decide just how and where to improve training... IF at all...
As the other answers have previously stated, helicopters tend to be pretty bad a gliding, but due to their role in the military (troop insertions, evacuations, close air support), they're also much more susceptible to small arms fire and RPG attacks as they usually fly slower and lower than fixed-wing aircraft.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.