Europe’s New Security Architecture: Ukraine as a Strategic Pillar of the Continent’s Defence Future

Since Russia’s invasion of Ukraine in 2014, and the full-scale assault launched in 2022, Ukraine has transformed from a state struggling to defend itself into one of Europe’s most capable and innovative military powers. Faced with the absence of a credible security umbrella, a weakened military and initially limited Western assistance, Ukraine has been forced to rely on ingenuity, rapid adaptation and technological innovation to survive.

After more than a decade of war, Ukraine has developed extensive expertise across multiple domains of modern warfare, including conventional kinetic operations, cyber warfare, and information and cognitive warfare. It has also pioneered significant advancements in automated aerial, maritime, ground and subsea systems, reshaping the future battlefield in real time. As a result, Ukraine is no longer solely a recipient of European security support but is increasingly emerging as a contributor to Europe’s defence and deterrence capabilities.

While Ukraine’s formal accession to the EU remains ongoing, integrating Ukraine into Europe’s evolving security and defence structures is both viable and strategically necessary given the scale of the threats facing the continent. Ukraine offers critical battlefield experience, expertise in rapid defence innovation, and insights that could help shape the future European pillar of NATO and broader European defence policy.

Drawing on Ukraine’s military capabilities, defence–industrial innovation and progress towards EU integration, this policy brief outlines pathways for positioning Ukraine as a central pillar of Europe’s emerging security architecture.

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