RT Journal Article T1 The war that redefined cyber war: Russia, Ukraine and the gap between theory and practice A1 Torres-Soriano, Manuel Ricardo K1 Cyber warfare K1 Russia- Ukraine war K1 Cyber operations K1 Cyber deterrence K1 Cyber resilience AB This article examines the Russia-Ukraine war as an empirical stresstest for dominant theoretical assumptions about cyber warfare.Drawing on a quantitative analysis of cyber incidents reported byUkraine’s Computer Emergency Response Team and structuredqualitative assessment of the conflict’s most significantoperations, it identifies a paradox: Russian offensive cyber activityhas been quantitatively prolific yet strategically marginal whencompared to conventional kinetic means. Even the mostdestructive attacks produced effects that were temporary,reversible and localised, whereas kinetic strikes against the samecategories of targets caused permanent, systemic damage. Thearticle identifies four mutually reinforcing explanations: thestructural constraints inherent to offensive cyber operations, theeffectiveness of Ukraine’s whole-of-society defensive ecosystembuilt through prior preparation and international cooperation, thefunctioning of cross-domain deterrence in conditions whereattribution ambiguity dissolves and Russian organisationaldysfunction in cyber-kinetic integration. The findings challengethe assumption that offensive cyber operations alone cangenerate effects comparable to those in the traditional domainsof warfare. However, the analysis also reveals that defensive cyberoperations have contributed materially to Ukraine’s wartimesurvival, suggesting that the strategic value of the cyber domainlies primarily in enabling resilience and intelligence collectionrather than in independent infrastructure destruction. PB Routledge YR 2026 FD 2026-06-25 LK https://hdl.handle.net/10433/27065 UL https://hdl.handle.net/10433/27065 LA en NO Manuel R. Torres-Soriano (25 Jun 2026): The war that redefined cyber war: Russia, Ukraine and the gap between theory and practice, European Security, DOI: 10.1080/09662839.2026.2688845 NO Universidad Pablo de Olavide. Departamento de Derecho Público DS RIO RD Jul 14, 2026