# Ukraine failed to join NATO in 2026

*World. 69% certain. Friday, 1 January 2027*

> Speculative fiction assembled from prediction-market prices. This has not happened.

**Russia did not capture Lyman and no ceasefire was reached by year-end.**

The Russo-Ukrainian war ended 2026 without a ceasefire, Peace agreement, or any change in front lines. Both sides continued fighting through the final month of the year.

Ukraine remained outside NATO as of 31 December 2026. The alliance had not extended an invitation nor finalized accession. Consequently, Ukraine did not achieve NATO membership in 2026.

Ukraine did not regain any portion of the Crimean peninsula during 2026. It also did not agree to cede territory to Russia. The status of Crimea and other borders stayed unchanged.

Russian forces failed to take the city of Lyman by year-end. No other major territorial gains were reported for Russia in 2026. The front around Lyman held steady.

Ukraine and Russia did not sign a Peace deal before 2027. The conflict was not declared won by either side. The war therefore persisted into the new year.

## Analysis

The absence of a ceasefire or Peace agreement means active hostilities continued throughout 2026, extending the humanitarian crisis and keeping regional security volatile. Without a formal pause, civilian casualties and infrastructure damage likely accumulated, reinforcing the war's entrenched nature.

Ukraine's failure to secure NATO membership leaves it without the collective defense guarantee that could deter further Russian aggression.

International condemnation of Russia's annexation remains unaltered, while Ukraine's inability to reclaim the peninsula diminishes its leverage in any future negotiations.

With no decisive battlefield developments such as the capture of Lyman, and no Peace treaty in place, the conflict is poised to continue into 2027. Diplomatic efforts will need to address both security guarantees for Ukraine and Russia's strategic aims, but the current stalemate suggests a protracted resolution remains uncertain.

### Background consulted for the analysis

- [Ukraine–NATO relations - Wikipedia](https://en.wikipedia.org/wiki/Ukraine%E2%80%93NATO_relations)
- [Relations with Ukraine | NATO Topic](https://www.nato.int/en/what-we-do/partnerships-and-cooperation/relations-with-ukraine)
- [Accession of Ukraine to the European Union - Wikipedia](https://en.wikipedia.org/wiki/Accession_of_Ukraine_to_the_European_Union)
- [Enlargement of NATO - Wikipedia](https://en.wikipedia.org/wiki/Enlargement_of_NATO)
- [Trump says Russia and Ukraine agreed to immediate energy ceasefire](https://www.axios.com/2026/10/11/trump-russia-ukraine-energy-ceasefire-zelensky)
- [Trump says Russia and Ukraine agree to an ‘energy ceasefire.’ Kyiv says attacks go on | AP News](https://apnews.com/article/russia-ukraine-war-yandex-trump-zelenskyy-f621fa788196f204448e7f75fcc78c68)

## What this was built from

- **Will Ukraine recapture Crimean territory by December 31, 2026?**: No, 98%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/will-ukraine-recapture-crimean-territory-by-june-30-2026)
- **Ukraine signs peace deal with Russia before 2027?**: No, 93%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/ukraine-signs-peace-deal-with-russia-before-2027)
- **Russia x Ukraine ceasefire agreement by December 31, 2026?**: No, 87%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/russia-x-ukraine-ceasefire-agreement-by)
- **Russia x Ukraine ceasefire by December 31, 2026?**: No, 91%; settles Thursday, 31 December 2026 (polymarket). [Market](https://polymarket.com/event/russia-x-ukraine-ceasefire-by)
- **Russia x Ukraine Peace Combo**: No, 96%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/russia-x-ukraine-peace-parlay)
- **Will Ukraine win the Russo-Ukrainian War?**: No, 69%; settles Thursday, 31 December 2026 (manifold). [Market](https://manifold.markets/chrisjbillington/will-ukraine-win-the-russoukrainian)
- **Will Russia capture all of Kostyantynivka by December 31, 2026?**: No, 88%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/will-russia-capture-all-of-kostyantynivka-by)
- **Will Russia capture Lyman by December 31, 2026?**: No, 95%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/will-russia-capture-lyman-in-2025)
- **Will Ukraine agree to cede territory to Russia before 2027?**: No, 95%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/will-ukraine-agree-to-cede-territory-to-russia-before-2027)
- **Ukraine joins NATO before 2027?**: No, 99%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/ukraine-joins-nato-before-2027)