John Hardie and Edmund Fitton-Brown outline Russia's military assistance to Iran via the Caspian Sea, a highly secure transit route. This collaboration benefits Moscow by raising energy prices and draining US munition stockpiles like Patriot interceptors, giving Russia a freer hand in Ukraine. Russia provides Iran with tactical intelligence, drone components to resist satellite jamming, and has agreed to deliver shoulder-launched air defense missiles. While Ukraine and Israel have attempted long-range strikes against trade vessels and ports to disrupt this flow, interdiction is difficult because the Caspian Sea operates as a protected, non-transparent Russian-Iranian military lake. (10)