Ukraine is developing new ballistic missiles that could significantly alter the dynamics of the war with Russia. Currently, Russia has been utilizing its sophisticated S-400 air defense systems not just for aerial defense, but also for surface strikes. However, the introduction of Ukrainian ballistic missiles poses a direct threat to Russian assets and infrastructure. This development potentially forces Russia to reassess its defensive priorities, choosing between protecting Moscow and continuing offensive operations against Kyiv. The new missiles would challenge Russia’s current strategy, as the S-400 system’s dual-use capability could be compromised by the need for dedicated ballistic missile defense. Experts believe this shift in capability levels the playing field, presenting Russia with a difficult and costly decision. This could alter the conflict’s trajectory and force a change in Russian military tactics.