Analytical Framework: What "Ending" Means

"Ending" the Ukraine war can mean very different things depending on one's definition:

• Formal peace treaty: Both sides sign a legally recognized settlement — the historical gold standard but the hardest to achieve
• Ceasefire agreement: Active shooting stops along a defined line — what most people mean colloquially by "end." Not permanent and can resume
• Frozen conflict: Shooting effectively stops without any formal agreement — the de facto situation in many post-Soviet conflicts (Transnistria, Nagorno-Karabakh 1994–2020, Abkhazia/South Ossetia)
• Victory: One side achieves its political objectives sufficiently to consider the war won — neither side has done this

This analysis examines the routes to any of these outcomes, not just formal peace treaties.

Scenario 1: Frozen Conflict

Definition: Active large-scale fighting gradually winds down along contested lines; no formal settlement is reached; the situation resembles Nagorno-Karabakh 1994–2020 or Cyprus since 1974.

How This Happens

Both sides exhaust their offensive capacity without reaching acceptable terms. Russia controls roughly 20% of Ukraine's pre-2022 territory; neither side can advance decisively; Western fatigue and US pressure cause aid to plateau; Ukraine cannot recapture significant territory; Russia cannot advance faster. The front slowly stabilizes.

Unlike a ceasefire, a frozen conflict doesn't require Russia's agreement — it simply requires that both sides stop major offensive operations. Skirmishes and drone/missile strikes could continue indefinitely.

Precedents

Post-Soviet frozen conflicts are the most instructive model: Moldova-Transnistria (1992–present), Georgia-Abkhazia/South Ossetia (2008–present), and Azerbaijan-Armenia Nagorno-Karabakh (1994–2020, then resolved by war in 2020). These can persist for decades.

Ukraine's Problem With This Scenario

A frozen conflict that leaves Russia in control of 20% of Ukraine deprives Ukraine of:

• Zaporizhzhia nuclear plant (occupied by Russia)
• Mariupol (major port city, occupied)
• Most of the Azov coastline
• The land bridge connecting Russia to Crimea
• International recognition of current borders

Ukraine's government under Zelensky has formally refused to recognize Russian territorial gains as legitimate, making any de jure frozen conflict politically problematic domestically. However, de facto frozen line is possible without de jure recognition.

Likelihood Assessment: Medium-High (30–40%) — The most historically common outcome for unresolved territorial conflicts, but Western political dynamics may force a more formal settlement attempt.

Scenario 2: Negotiated Settlement

Definition: Direct or mediated negotiations produce a formal ceasefire or peace agreement, potentially with territorial, security, and economic components.

Current Status (February 2026)

The Trump administration entered office in January 2025 with commitments to end the Ukraine war "in 24 hours" — a campaign hyperbole but reflecting genuine intent to push both sides toward talks. Key diplomatic developments by early 2026:

• US envoy Keith Kellogg has conducted shuttle diplomacy between Kyiv and European capitals (not Moscow directly) since early 2025
• Saudi Arabia has been offered as a mediation venue
• Ukraine has signaled willingness to discuss a ceasefire (not peace treaty) on certain conditions
• Russia has indicated conditions for talks that include Ukrainian concessions of occupied territory
• The US has applied pressure on Ukraine through pausing certain aid discussions

What Agreement Would Require

A negotiated settlement face enormous bridging challenges:

Likelihood Assessment: Medium (25–35%) — US pressure creates genuine momentum, but the gap between positions remains so large that formal agreement is distinctly harder than a ceasefire-like halt.

Scenario 3: Ukrainian Territorial Recovery

Definition: Ukraine achieves sufficient battlefield success to compel Russia to negotiate from a position of weakness, recovering significant territory and obtaining meaningful security guarantees.

What This Would Require

A Ukrainian strategic breakthrough would require simultaneously:

• Sustained Western military support at significantly higher levels (more artillery, F-16 employment at scale, long-range strike authorization)
• Ukrainian mobilization of additional trained forces sufficient to execute combined-arms offensives
• Successful deep strikes degrading Russian logistics beyond recovery speed
• Possibly, internal Russian political pressure from territorial losses that changes Putin's calculus

Assessment

Ukraine's 2023 counteroffensive demonstrated the difficulty of advance against prepared Russian defensive positions. The military balance in early 2026 remains unfavorable for major Ukrainian offensives — Russia maintains artillery advantage, air power advantage, and sufficient manpower reserves.

The Kursk incursion (August 2024) showed Ukraine can conduct surprise operations into Russian territory but also demonstrated the limitations: Russia withdrew forces from Donbas to respond, but it did not produce a strategic breakthrough.

Likelihood Assessment: Low (10–15%) — Not impossible, but would require significant change in Western support posture that appears unlikely under current US administration.

Scenario 4: Russian Collapse or Regime Change

Definition: Internal Russian political upheaval — coup, popular revolution, economic crisis, or significant elite defection — causes Russia to withdraw from Ukraine or seek genuine peace on favorable terms.

The Argument for This Scenario

• Russia's economy is under severe stress — 21% interest rates, 8–12% inflation, rising military dependency
• Elite resentment of Putin is plausible given the war's damage to Russia's economic and international position
• The Prigozhin mutiny (June 2023) demonstrated that armed challenge to Putin's authority was conceivable
• Long wars historically create conditions for political instability in the aggressor state

The Argument Against

• The Russian security state apparatus is deeply integrated and has managed elite threats effectively
• Nationalist sentiment in Russia does not easily translate to "end the war" — much Russian opposition is frustrated the war isn't being won harder
• Russia's security services (FSB) are fully mobilized against internal dissent
• When the Soviet Union collapsed (1991), it did not lead to Russia withdrawing from wars — it led to chaos and new conflicts

Likelihood Assessment: Low (5–10%) — Possible but historically rare during an active war. Would be transformative if it occurred.

Scenario 5: Escalation and Wider Conflict

Definition: The war expands — through NATO direct involvement, nuclear weapons use, strikes on additional countries, or other escalatory events.

Escalation Pathways

• NATO direct involvement: Russian strikes on NATO territory trigger Article 5 response; possible in a scenario where Russian drone/missile error or deliberate escalation hits Poland, Romania, or Baltic states
• Nuclear weapons use: Russia employs tactical nuclear weapons in Ukraine — would be unprecedented since 1945; NATO response uncertain but potentially transformative
• Third-party escalation: Belarus direct military involvement (possible but Lukashenko has avoided it); Iranian or DPRK forces more directly integrated
• Ukrainian strikes deep inside Russia: Ukraine has already struck Moscow with drones and hit the Kerch bridge; further escalation possible

Deterrence Factors

Multiple factors have prevented escalation to date: NATO's careful red-line management, Ukraine's restraint on deep strikes (partially), Russia's awareness that nuclear use would likely trigger massive Western response, and all parties' calculation that wider war serves nobody's interests.

Likelihood Assessment: Low (5–10%) — But with asymmetric consequences. Even small escalation probability matters given potential for nuclear dimension.

The Trump Factor in 2026

The most significant exogenous change to the war's trajectory in 2025–2026 has been the return of Donald Trump to the US presidency. Trump's approach differs fundamentally from Biden's:

• Trump has questioned the value of continued aid to Ukraine and pushed for rapid negotiation
• His administration froze certain military aid packages early in 2025 as negotiating leverage
• Trump has engaged directly with Putin in ways the Biden administration avoided
• Trump views the conflict primarily through a transactional lens — what does the US get from supporting Ukraine?
• His negotiating approach: press both sides to accept a deal, regardless of whether the deal is "just" by traditional standards

This creates a scenario where the US acts as a mediator pressuring Ukraine to accept terms short of its stated objectives — the opposite of the Biden-era "support as long as it takes" posture. The implications: Ukraine faces both military and political pressure simultaneously.

Ukraine's Essential Red Lines

Ukraine's stated minimum acceptable terms under Zelensky (as of early 2026):

• No formal territorial concession: Ukraine will not legally recognize Russian sovereignty over occupied territory — any settlement must preserve Ukraine's territorial claim in international law, even if practical control is ceded temporarily
• Meaningful security guarantees: Bilateral security commitments from key Western states (UK, France, Germany at minimum) with actual capabilities; NATO membership preferred
• Continuation of Western military support: Ceasefire cannot mean Ukraine disarms while Russia retains full military capacity
• Return of all prisoners and deported children: Non-negotiable humanitarian demands
• War crimes accountability: ICC processes must be able to continue

Russia's Minimum Demands

Russia's publicly stated negotiating positions under Putin (as of early 2026):

• Formal Ukrainian recognition of Russian territorial control: The four annexed oblasts plus Crimea must be legally recognized as Russian
• Ukrainian neutrality: No NATO membership, no foreign military bases on Ukrainian territory
• Limits on Ukrainian military: Restrictions on force size, weapons types, and military alliances
• Sanctions relief: Western sanctions lifted or substantially reduced in exchange for a ceasefire
• No war crimes accountability: Russian officials cannot face ICC prosecution in any agreement Russia accepts

The gap between Ukraine's red lines and Russia's minimum demands is very large. Bridging it would require significant concessions from at least one party — or a change in the military balance.

Probability Summary (February 2026)

These are not predictive guarantees — they reflect the weight of evidence and historical precedent as of February 2026. Situations change rapidly in wartime.

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