Russian ships have been transporting large quantities of Iranian-made artillery shells and other ammunition across the Caspian Sea to resupply Russian troops fighting in Ukraine, causing an increasing problem for the United States and its allies, who are trying to disrupt cooperation between Moscow and Tehran. One contract from September 2022, viewed by WSJ, showed a deal between Iran’s Defense Ministry and Russia’s JSC Rosoboronexport [state intermediary agency for Russia's exports/imports of defence-related and dual-use products, technologies and services] for over 74,000 artillery shells to be sold to Russia for US $1. "Russia is now dependent on Iran for the first time in the broad scope of the Russia-Iran relationship