Sunday, May 17, 2026

When the Guns Fall Silent: Ukraine After the War

By Oleksandr Kraiev & Andreas Umland

Sunday, May 17, 2026

 

Kyiv, the EU, and the coalition of the willing to help Ukraine must prepare for numerous new challenges once the war ends.

 

In the spring of 2026, the chances of a cease-fire between Ukraine and Russia appear as slim as ever. Moscow remains unwilling to settle for anything less than at least a partial victory, yet it lacks the military strength to enforce one. A “balance of death” has taken hold on the front lines, characterized by swarms of drones, attrition, and incremental territorial gains. On May 13 and 14, Russia launched over 1,400 drones, missiles and decoys on Ukraine — the war’s largest air attack so far. War, not peace, remains the most likely scenario.

 

Yet history rarely ends as expected. Europe cannot afford to be unprepared for the consequences of a sudden cease-fire. Should the fighting cease, Ukraine would not face a simple recovery period, but rather the beginning of a new, multidimensional struggle — one that would simultaneously test its security, economy, institutions, demographics, and political cohesion. Winning peace, especially under an imperfect cease-fire agreement, will be just as demanding as surviving the war.

 

The first and most important challenge remains the establishment and sustainability of security. On its own, a cease-fire would not signal a shift in the Kremlin’s strategic objectives. Without a fundamental transformation of the Russian regime, Moscow would interpret a cease-fire not as an endpoint but as a mere pause — an interregnum in Russia’s long imperial campaign. Reduced activity on the battlefield would likely be accompanied by intensified hybrid warfare from the Kremlin: cyberattacks, disinformation, industrial sabotage, and political subversion aimed at undermining the Ukrainian state from within.

 

A long-term peace treaty poses its own challenges. Indeed, the stability of a postwar order depends less on the legal wording of an agreement than on the balance of power it leaves behind. Pressure on Kyiv to demilitarize fortified areas in eastern Ukraine would be particularly dangerous, as such a requirement would pave the way for deeper Russian incursions and increase incentives for Moscow’s eventual resumption of war to capture even more territory. For this reason, Western security promises would only be meaningful if they were backed by concrete capabilities.

 

Given Washington’s fluctuating stance toward Ukraine since 2025, the primary responsibility for enforcing a cease-fire or peace treaty’s provisions will likely lie with Europe. Even once fighting pauses, military aid and defense cooperation would need to continue almost to the same extent as during wartime. The most effective deterrent will not lie in declarations, but in swiftly implemented practical measures, such as integrating Ukraine’s air defense into NATO’s eastern flank, deploying Western aircraft to protect Ukrainian airspace, and enabling the resumption of civilian air traffic. Security integration should also work in both directions: Ukraine’s battle-tested armed forces could strengthen deterrence against Russia in the Baltic region and position the country as a pillar of a new European security architecture.

 

Once security is established, economic recovery will be the decisive test. After a GDP slump of over 30 percent in 2022, Ukraine returned to growth in 2023–25 despite labor shortages and repeated Russian attacks. Yet the damage wrought has been immense. Direct material destruction by Russia has amounted to over $195 billion, with the total need for reconstruction over the next ten years estimated at $588 billion.

 

Ukraine’s rebirth cannot mean simply restoring the pre-war economy. Instead, a new approach is necessary: decentralized infrastructure, modernized institutions, resilient logistics, and a focus on human capital. Fragmented, privately funded donor projects will not suffice. Instead, international aid — through the EU’s €50 billion facility for Ukraine and G7 loans secured by frozen Russian assets — would need to be used to attract private investment. The extent of investment potential in postwar Ukraine would, of course, also depend on the security outlook, the state of the rule of law, and the country’s increasing integration into the EU single market.

 

Energy supply will also be a critical bottleneck. After Russia’s many targeted attacks over the last four years, the Ukrainian energy system is producing 4 gigawatts less than the country needs, and it remains vulnerable despite replacement supplies from Europe. A reconstruction of Soviet-era centralized systems would be both impractical and misguided. The war suggests a more resilient model: decentralized renewable energy, microgrids, and diverse storage capacities. Modernizing the energy sector alone will require over $90 billion in the next ten years and at least $5 billion for immediate stabilization once the fighting subsides.

 

The problem beneath Ukraine’s soil is also fundamental. About a quarter of the country — roughly 137,000 square kilometers — is contaminated with unexploded ordnance. Ukraine is now the most heavily mined country on Earth. The cost of mine clearance is estimated at $34.6 billion over ten years, while the extent of environmental damage exceeds $60 billion. Without large-scale clearance and remediation efforts, reconstruction, agriculture, and the return of refugees will remain impossible. These are not minor environmental issues — they are a physical prerequisite for the country’s survival.

 

Economic recovery will almost certainly be uneven. While Ukraine’s central and western regions have preserved or resumed much of their pre-war social and economic life during the war, the devastated frontline areas in the east and south require tailored strategies to prevent permanent depopulation and impoverishment.

 

Parallel to reconstruction is Ukraine’s long march toward the European Union. Accession is often discussed in political terms, but in reality, it remains a deeply technical matter. EU accession requires the implementation of approximately 100,000 pages of EU law — a task that would constitute an extraordinary endeavor even in peacetime. Corruption remains a serious obstacle, although recent scandals have also shown that Ukraine’s post-Euromaidan anti-corruption institutions are becoming increasingly effective.

 

The political sustainability of future EU membership will also depend on the achievement of intermediate steps toward the ultimate goal of accession. Gradual sectoral integration into the EU single market — transport, energy, digital services — would yield visible results while negotiations on full membership continue. Yet Ukraine’s success will also depend on reforms within the EU. Unanimity rules make enlargement vulnerable to vetoes, and, absent institutional reforms, the integration of a large agricultural and industrial country like Ukraine will challenge existing EU policies.

 

The process of addressing war crimes, meanwhile, will span decades. By early 2026, Ukrainian authorities had already recorded more than 213,000 suspected war crimes. Only a fraction of these will ever be prosecuted. Establishing accountability and justice must therefore be approached in a nuanced manner. High-ranking Russian officials may one day face international tribunals; however, most perpetrators will never appear before a Ukrainian or international court. Trials in absentia, systematic truth-seeking, and comprehensive commemorative work will therefore be crucial to achieving a historical reckoning.

 

Domestically, transitional justice with a nuanced approach will be necessary. Blanket punishment of all forms of collaboration with the occupiers would overwhelm the courts and alienate the liberated territories from the nation. Extrajudicial mechanisms — lustration, conditional amnesties, and victim-centered reparations — offer more realistic paths to reconciliation without negating responsibility.

 

Underlying all these challenges is a demographic shock unprecedented in Ukraine’s post-World War II history. The population in government-controlled areas has fallen from around 42 million before 2022 to about 31.5 million today. Over 6 million Ukrainians are living as refugees abroad; the birth rate has plummeted to less than one child per woman; and mortality has risen sharply.

 

Even a permanent peace deal would not automatically reverse these trends. Some refugees would no doubt return, but the lifting of martial law could also trigger a new wave of emigration as men join their families abroad. To rebuild, Ukraine may have no choice but to become a country of immigration, which would mean a profound transformation for society and politics alike. Should the war drag on, population decline threatens to become irreversible, further undermining the country’s economic viability.

 

Finally, social stability will be put to the test as soon as martial law ends. Elections will revive political competition and expose social divisions between various groups: between returnees and those who stayed behind; between veterans and civilians; and between regions scarred by occupation and those that have been comparatively spared. Unresolved territorial issues will remain politically explosive. A new, powerful voter bloc of war veterans — numbering over 800,000 people — will likely shape politics for decades to come. Their reintegration is already one of Ukraine’s most urgent social tasks and, at the same time, one of its greatest potential strengths.

 

All of this gives rise to three strategic imperatives. First, current planning for the “day after” must not distract from sustaining Ukraine’s defense efforts today; for the time being, military support must remain the overriding priority. Second, reconstruction and the safeguarding of human capital must begin now and should not wait for peace. Third, Kyiv and its partners must prepare intellectually and institutionally for turbulent developments following the cessation of war.

 

A Ukrainian victory would consolidate European security and strengthen the European project. Ukraine’s decline during or after the war, on the other hand, would grant Russia a belated victory and spur authoritarian revisionism far beyond Eastern Europe. The end of fighting — whenever it comes — will be celebrated by Ukrainians, yet will neither reduce Russian imperialism nor resolve many of Ukraine’s accumulated domestic problems. It will merely mean the transition to a new phase of intense political developments whose outcome will continue to significantly impact the future of Europe.

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