The war between Russia and Ukraine ended 2026 without any decisive victory for either side. Ukraine failed to retake the Crimean peninsula by the December 31 deadline. Neither side achieved a formal ceasefire before the year closed. The conflict therefore persisted throughout the final months of the year.

No Ukrainian forces reported establishing lasting control over any Crimean locality. The outcome left the territorial dispute unchanged.

Negotiations for a Peace agreement produced no binding treaty before 2027. A ceasefire proposal also failed to materialize by the end of December, as documented on 31 December. Both parties continued military operations across contested fronts. The absence of a truce kept hostilities active.

Russia did not capture the entirety of the town of Kostyantynivka during 2026. Conversely, Ukrainian forces did not achieve a comprehensive victory in the broader war. Territorial lines on the front remained largely static after earlier offensives. The lack of a decisive shift reinforced the stalemate.

Throughout 2026, Russia refrained from opening a new invasion in another country. The war remained confined to the Ukrainian theater. International attention continued to focus on the ongoing hostilities without new expansion. The year closed with the conflict unresolved.