"The knowledge transfer between Iran and Russia presents the U.S. with a more capable Iran that remains hostile to the U.S. and its allies in the region. This transfer of Russian capabilities represents the latest high-water mark in Iran’s effort to increase its own conventional military capabilities. Iranian conventional military capabilities will continue to increase rapidly as long as Russian and Iranian forces continue to operate alongside each other in Syria simply by learning the best practices for developing, deploying, and using such forces in combat. Russia is poised to teach Iran additional methods of warfare as it prepares for the next phase of the pro-regime campaign in Syria. "