Direct proof of use
The S-300 appears in the Russia-Ukraine war in two distinct roles. Ukraine operated the system as a long-range surface-to-air missile capability and received an additional S-300 air-defense system from Slovakia in April 2022. U.S. Defense Department statements described the transfer as support for Ukraine's defensive capabilities and as a system expected to help protect Ukraine.
Russian forces also used S-300 missiles outside their normal surface-to-air role. In July 2022, The War Zone reported Ukrainian official claims that Russia had fired S-300 missiles at land targets in Mykolaiv Oblast, and noted that both Russian and Ukrainian S-300P/S-300V family systems were being used in the war.
Sources: Slovakia to Supply S-300 Air Defense System to Ukraine, Austin Call with Slovak Defense Minister, Russia Now Firing S-300 at Land Targets
Timeline
On March 16, 2022, President Volodymyr Zelenskyy asked the U.S. Congress for S-300 and similar air-defense systems while Ukraine was under Russian air and missile attack. On April 8, 2022, Slovakia supplied an S-300 air-defense system to Ukraine, and the United States announced a Patriot deployment to Slovakia to backfill Slovak air defense.
By July 2022, Ukrainian regional reporting described Russian S-300 missiles being fired in a land-attack role against Mykolaiv Oblast. Later reporting from Sloviansk in April 2023 identified Russian S-300 missile fire against residential areas, showing the ground-attack use continuing beyond the first summer of the full-scale invasion.
Sources: Zelenskyy Address to US Congress, Slovakia to Supply S-300 Air Defense System to Ukraine, Russia Now Firing S-300 at Land Targets, Washington Post Sloviansk S-300 Rockets
Narrative
For Ukraine, the S-300 was part of the legacy Soviet air-defense inventory that remained central when Russia expanded the war in February 2022. The system's value was reflected in Ukrainian appeals for additional S-300-class weapons and in Slovakia's decision to send its system to Ukraine while receiving allied Patriot coverage at home.
For Russia, S-300 use in Ukraine included conventional air-defense deployment and the documented firing of S-300 missiles at ground targets. The land-attack reporting should be kept separate from the system's standard air-defense role: the July 2022 report attributed the Mykolaiv strikes to Ukrainian officials, did not identify the exact S-300 variant, and described the ground-attack employment as a secondary capability rather than the system's principal design purpose.
The documented conflict record therefore combines Ukrainian defensive employment and reinforcement with Russian missile fire against Ukrainian territory. The sources directly support use, transfer, and reported ground-attack employment; they do not by themselves establish a complete order of battle or quantify remaining Ukrainian or Russian S-300 inventories.
Sources: Zelenskyy Address to US Congress, Slovakia to Supply S-300 Air Defense System to Ukraine, Austin Call with Slovak Defense Minister, Russia Now Firing S-300 at Land Targets, Washington Post Sloviansk S-300 Rockets
