Analyzing the Effectiveness of Russian Air Defense Against Ukrainian Strikes

A recent report by the Royal United Services Institute (RUSI) highlights the significant improvements in Russian air defense systems since the onset of the full-scale invasion of Ukraine in February 2022. Initially, Russian air defenses struggled, leading to embarrassing losses against Ukrainian UAVs and aircraft. However, over time, these defenses have evolved into a formidable obstacle for Ukraine's deep-strike campaign, intercepting a substantial majority of Ukrainian munitions targeting critical infrastructure and military sites.

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According to RUSI, fewer than 10% of Ukraine's deep strikes successfully hit protected targets within Russia, with even fewer causing significant damage. The report indicates that while Ukraine has made strides in targeting Russian oil infrastructure and military-industrial sites, the effectiveness of these strikes has diminished. For instance, the success rate of Guided Multiple Launch Rocket System (GMLRS) strikes has plummeted from 70% in 2022 to approximately 8% in 2025. This decline underscores the challenges Ukraine faces in penetrating Russian air defenses, which have become increasingly sophisticated and resilient.

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Despite the strength of its air defense, RUSI identifies critical vulnerabilities within Russia's supply chain that Ukraine could exploit. The Russian defense industry relies heavily on foreign imports for essential components, such as microelectronics and raw materials. For example, the S-400 systems depend on the Elbrus-90 microcomputing system, which is manufactured using Taiwanese technology. Sanctions and disruptions to these supply chains could severely impact the production and repair capabilities of Russian air defense systems.

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To counteract the effectiveness of Russian air defenses, Ukraine has employed various strategies, including the use of AGM-88 anti-radiation missiles to target Russian radar systems. However, the report notes that even successful combined attacks are often not repeatable due to the high costs and resource expenditure involved. Ukraine's reliance on drones, which can cost between $20,000 and $80,000 each, has led to a situation where only a small fraction of these munitions reach their intended targets, often resulting in negligible damage.

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While the RUSI report acknowledges the improvements in Russian air defenses, it also emphasizes that the perception of their failure is misleading. The geographical dispersion of targets across Russia complicates defense efforts, making it impossible to protect all critical sites effectively. Critics argue that while Russian defenses have absorbed significant Ukrainian resources, they are not infallible and remain vulnerable to targeted cyber and kinetic attacks.

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The ongoing conflict has revealed a complex interplay between Ukrainian offensive capabilities and Russian defensive strategies. As Ukraine continues to adapt its tactics, the potential for exploiting Russian supply chain vulnerabilities remains a critical area of focus. The report suggests that if Ukraine can enhance its strike capabilities and coordinate attacks effectively, it may still find ways to penetrate Russian defenses and achieve its military objectives.

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