Hints:
 Attack helicopters should be used in four cases: to 
 screen or anchor exposed flanks, as airborne reconnaissance 
 units, as escorts for transport helicopters, and to 
 engage enemy armor from long range.
                                         
 Remember that from the 1970s and on, most western armies 
 have been equipped with advanced night-fighting capabilities. 
 As a result, western armies, in particular the United States 
 and its NATO allies, are much better at conducting 
 round-the-clock operations than eastern armies.