Conventional military thought, derived from the writings of Prussian military theorist Carl von Clausewitz, dictates that one identify the enemy’s center of gravity, then “concentrate all energy against it.” For the Islamic Republic of Iran, it center of gravity — “the source of power that provides moral or physical strength, freedom of action, or will to act” — is its Islamic Revolutionary Guard Corps, whose principal mission is to keep the regime in power. While the U.S. and Israeli militaries have systematically dismantled Iran’s conventional military and nuclear ambitions — the direct threat to them — they have left the...