Yep.I think Brenus has a point there.Ofcourse the land forces need SAM´s to provide cover when on movement. Actually when we look at the reacent conflicts the defender has always had very outdated weapon systems for protecting its troops from Air attacks.Ofcourse if the attacker has absolute Air supremacy the defender is mostly immobilized or will commit suicide moving its troops like in reacent Gulf Wars. But a smart defender who wants to win battles tryes always to have a local superiority over the enemy if he wants to stop the attacker becouse in most cases the attacker has superiority in overall numbers so the attacking side has potential to succeed in their Operation. So the modern defender needs to hide his forces properly when staying in put.provide enough weapon systems to protect his forces while in movement and try to provide locall superiority in both Air and Land when attacking.