We still have inflatable tanks...the acronymn was BATV...don’t remember what it stands for. They now come with a generator and a heating device, to give them a thermal signature.
All warfare is based on deception. Hence, when able to attack, we must seem unable; when using our forces, we must seem inactive; when we are near, we must make the enemy believe we are far away; when far away, we must make him believe we are near. [Sun Tzu]