Iran was prepared for the US to dominate with “overwhelming” airpower. Iran saw the US take out Saddam’s centralized command with airpower and decided to focus on missiles, drones, and decentralization. Taking out the snake’s head is less effective when there are many snakes with their own weapons, each able to lash out. Iran knew it couldn’t go toe to toe with the US in the skies, so scattered and hid their weapons. Iran knows that the US would not like a long war, so they planned for a long war where a determined Iran can outlast a US that grows weary with the costs of war.