Ukraine’s ongoing conflict with Russia remains the dominant barrier to NATO accession before 2027, as alliance rules require unanimous member consent and preclude extending Article 5 collective defense guarantees to a nation engaged in active hostilities. Recent summits, including Ankara, emphasized sustained military aid and interoperability without advancing formal membership invitations or timelines. Statements from senior Ukrainian figures, including former commander Valerii Zaluzhnyi, have highlighted persistent gaps in standards and capabilities, reinforcing trader views that structural and geopolitical obstacles will persist. While a swift ceasefire followed by accelerated reforms and full consensus among allies could theoretically alter the path, the compressed timeframe and entrenched positions make such shifts improbable within the resolution window.