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NATO's eastern flank builds a new iron curtain of mines, bunkers, and barriers

NATO's eastern flank builds a new iron curtain of mines, bunkers, and barriers

Force in Play

Five European nations abandon the landmark landmine ban as Cold War-era border fortifications return to the continent

February 20th, 2026: Poland Formally Exits Mine Ban Treaty

Overview

Updated May 29

In 1997, 122 countries signed a treaty banning anti-personnel landmines, buoyed by a campaign that won the Nobel Prize. By 2016, Poland had destroyed its entire stockpile, but on February 20, 2026, it withdrew and announced plans to restart mine production and mine its 400-mile eastern border within 48 hours. These minefields will integrate into a $2.5 billion fortification network stretching from the Baltic Sea to the Carpathian foothills.

Poland is the fifth NATO member to exit the Mine Ban Treaty since Russia's full-scale invasion of Ukraine in 2022; Finland, Estonia, Latvia, and Lithuania had withdrawn in the preceding months. Hundreds of bunkers, anti-tank ditches, and drone defense systems are under construction from northern Estonia to southern Poland, marking the most significant remilitarization of European borders since the Cold War. Poland now spends nearly 5% of its gross domestic product on defense, the highest rate in NATO, surpassing even the United States.

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Key Indicators

5
Treaty withdrawals
NATO members that have exited the Mine Ban Treaty since 2024: Finland, Estonia, Latvia, Lithuania, and Poland
4.8%
Poland defense/GDP
Poland's 2026 defense budget as a share of gross domestic product, the highest in NATO
48 hours
Mining readiness
Time Poland says it will need to lay mines along its entire eastern border if threatened
1.2M
Annual mine output
Planned yearly production at Poland's BELMA plant in Bydgoszcz, a 25-fold increase from current capacity

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People Involved

Donald Tusk
Donald Tusk
Prime Minister of Poland
Leading Poland's defense buildup on NATO's eastern flank
 Cezary Tomczyk
Cezary Tomczyk
Deputy Minister of Defense, Poland
Overseeing implementation of mine production and East Shield integration

Organizations Involved

International Campaign to Ban Landmines (ICBL)
International Campaign to Ban Landmines (ICBL)
International advocacy coalition
Opposing treaty withdrawals

The Nobel Peace Prize-winning coalition that drove the creation of the 1997 Mine Ban Treaty and now monitors compliance across 164 member states.
North Atlantic Treaty Organization (NATO)
North Atlantic Treaty Organization (NATO)
Military alliance
Supporting eastern flank fortification while not taking official position on treaty withdrawals

The 32-member military alliance whose eastern flank states are driving the largest European border fortification effort since the Cold War.
BELMA S.A.
BELMA S.A.
State-owned defense manufacturer
Scaling mine production 25-fold

Poland's only anti-tank mine manufacturer, based in Bydgoszcz, now ramping output from roughly 100,000 to 1.2 million mines per year.

Timeline

December 1997 February 2026

12 events Latest: February 20th, 2026 · 6 months ago Showing 8 of 12
Tap a bar to jump to that date

  1. Poland Formally Exits Mine Ban Treaty

    Latest Treaty

    Poland's withdrawal from the Ottawa Convention takes effect. Officials announce that the state-owned BELMA plant will scale anti-tank mine production from 100,000 to 1.2 million units per year, and that the military now has legal authority to produce, stockpile, and deploy anti-personnel mines.

  2. Poland Unveils Bluszcz Mine-Laying System

    Military

    Prime Minister Tusk attends a demonstration of the Bluszcz ("Ivy"), an unmanned hybrid vehicle capable of autonomously deploying up to 100 anti-tank mines per run. He announces Poland will achieve the capability to mine its entire eastern border within 48 hours.

  3. Baltic Withdrawals Take Effect

    Treaty

    Estonia, Latvia, and Lithuania formally exit the Mine Ban Treaty, becoming the first countries ever to withdraw from the convention.

  4. Baltic States File Withdrawal Instruments

    Treaty

    Estonia, Latvia, and Lithuania deposit their formal instruments of withdrawal from the Mine Ban Treaty with the United Nations. The six-month withdrawal period begins.

  5. Five NATO Members Announce Treaty Withdrawal

    Treaty

    Defense ministers of Estonia, Latvia, Lithuania, and Poland issue a joint statement recommending withdrawal from the Ottawa Convention, citing increased military threats from Russia and Belarus. Finland follows with its own announcement on April 1.

  6. East Shield Construction Begins

    Construction

    Physical construction of Poland's East Shield border fortification system begins along the eastern border.

  7. Poland Unveils East Shield Program

    Defense

    Poland announces the East Shield, a 10-billion-zloty ($2.5 billion) fortification project covering roughly 700 kilometers of border with Belarus and Russia's Kaliningrad exclave. The system will include bunkers, barriers, shelters, and drone defenses extending up to 50 kilometers into Polish territory.

  8. Baltic States Announce Joint Defense Line

    Defense

    Estonia, Latvia, and Lithuania announce the Baltic Defense Line, a joint fortification project along their borders with Russia and Belarus featuring hundreds of bunkers, anti-tank ditches, and barriers.

  9. Russia Launches Full-Scale Invasion of Ukraine

    Military

    Russia's invasion transforms European security calculations. Both Russian and Ukrainian forces use landmines extensively, contaminating an estimated 174,000 square kilometers of Ukrainian territory.

  10. Poland Destroys Its Mine Stockpile

    Compliance

    Poland completes the destruction of its entire anti-personnel mine inventory, fulfilling its treaty obligations.

  11. Poland Ratifies Mine Ban Treaty

    Treaty

    Poland becomes a state party to the Ottawa Convention, committing to destroy its existing anti-personnel mine stockpile.

  12. Ottawa Convention Signed

    Treaty

    122 countries sign the Anti-Personnel Mine Ban Treaty in Ottawa, Canada, capping a global campaign that won the Nobel Peace Prize. The treaty prohibits the use, production, stockpiling, and transfer of anti-personnel mines.

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

1929 - June 1940

France's Maginot Line (1930s-1940)

France spent over a decade and billions of francs building the Maginot Line, a network of reinforced concrete fortifications, obstacles, and weapons installations along its border with Germany. The system was one of the most sophisticated defensive structures ever built, designed to channel any German invasion away from the fortified border.

Then

Germany bypassed the Line entirely in May 1940 by invading through Belgium and the Ardennes forest. France fell in six weeks. The Maginot Line became synonymous with expensive, static defenses that fail against mobile warfare.

Now

Military historians note the Line actually succeeded in its primary design goal — forcing the enemy to attack elsewhere. Its failure was strategic, not structural: France did not extend the fortifications to cover the Belgian border and did not adapt its mobile forces to respond to the resulting gap.

Why this matters now

The parallel is cautionary. Poland's East Shield and the Baltic Defense Line face the same strategic question: fortifications shape where an adversary attacks, not whether they attack. The value depends entirely on whether the defensive line is integrated into a broader military strategy — including mobile reserves, air power, and allied reinforcement — rather than treated as a standalone solution.

November 1939 - March 1940

Finland's Mannerheim Line (1939-1940)

Finland built a defensive fortification line across the Karelian Isthmus, featuring 157 machine-gun positions and 8 artillery positions integrated with natural terrain. When the Soviet Union invaded in November 1939 with roughly 600,000 troops, the Mannerheim Line held for over two months against an army many times Finland's size, inflicting massive casualties and forcing Moscow to commit far more resources than planned.

Then

The line eventually fell in February 1940 after a concentrated Soviet offensive, and Finland was forced to cede territory in the Moscow Peace Treaty. But Finnish resistance earned international admiration and preserved the country's independence.

Now

The Winter War demonstrated that prepared defensive positions on difficult terrain could dramatically raise the cost of invasion by a larger power. Finland maintained its sovereignty through a combination of fortification, terrain, and willingness to fight.

Why this matters now

Poland and the Baltic states are explicitly drawing on this model — using prepared defensive positions, natural obstacles, and minefields to make a ground invasion prohibitively costly for Russia, compensating for the attacker's numerical advantage with fortified terrain.

December 2001 - June 2002

United States Withdrawal from Anti-Ballistic Missile Treaty (2002)

President George W. Bush announced the United States would withdraw from the 1972 Anti-Ballistic Missile Treaty with Russia, giving the required six months' notice. The administration argued the Cold War-era treaty prevented the U.S. from developing missile defenses against new threats from smaller states. Russia responded the following day by declaring it would no longer abide by the separate START II nuclear reduction agreement.

Then

The immediate international reaction was muted, with critics warning the move would destabilize nuclear arms control. Russia announced a buildup of its own nuclear capabilities to counterbalance U.S. missile defense systems.

Now

The withdrawal is now widely seen as the opening move in the collapse of the Cold War-era arms control architecture. The Intermediate-Range Nuclear Forces Treaty followed in 2019, and New START barely survived to its 2026 expiration. Treaty negotiator John Rhinelander's prediction that it would be 'a fatal blow' to nonproliferation proved prescient.

Why this matters now

The Mine Ban Treaty withdrawals follow the same pattern: a major security shift (Russia's invasion of Ukraine, like post-9/11 threat perceptions) provides justification for exiting a treaty that constrained military options. The question is whether the Ottawa Convention follows the same trajectory as nuclear arms control — where one withdrawal triggered a cascade that dismantled the entire regime.

Sources

(12)
+6
The Washington Post Euronews NBC News CBC News Arms Control Association Human Rights Watch Wikipedia Notes From Poland Kyiv Post Next Gen Defense Euronews Wikipedia