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Ukraine's President Volodymyr Zelenskyy (L), Britain's Prime Minister Keir Starmer (C) and France's President Emmanuel Macron (R)

The Fantasy of a European Reassurance Force for Ukraine

A European "reassurance force" for Ukraine risks being another notional "guarantee" offering little more than a false sense of security.
A collage of images featuring scenes from the Russia - Ukraine War.

Just Security’s Russia–Ukraine War Archive

A catalog of over 100 articles (many with Ukrainian translations) on the Russia Ukraine War -- law, diplomacy, policy options, and more.
The Ukrainian and Taiwanese flags

A Security Guarantee for Ukraine? Look to the Taiwan Relations Act

The United States and its allies can use the Taiwan model to make post-war Ukraine more secure without writing checks they cannot cash.
U.S. President Donald Trump sits at a table with Ukrainian President Volodymyr Zelensky, European Commission President Ursula von der Leyen, NATO Secretary-General Mark Rutte, and other European leaders

Trump, Zelenskyy, European Leaders in White House Meeting: Progress Toward a Deal?

Getting to any deal between Ukraine & Russia will require the United States & Europe to stand by Ukrainians & stare down Russia's demands.
Local residents carry their belongings out of a heavily damaged residential building following a Russian strike in the town of Bilozerske, Donetsk region on August 12, 2025, amid the Russian invasion of Ukraine. The advances come just days before U.S. President Donald Trump is due to meet his Russian counterpart Vladimir Putin in Alaska for talks on the war, the first meeting between a sitting US and Russian leader since 2021. (Photo by GENYA SAVILOV/AFP via Getty Images)

In Trump’s Planned Meeting With Putin, Beware of Traps, Play the Right Cards

President Trump must avoid Putin’s traps, ramp up the pressure on Russia, and make clear that the United States will back Ukraine’s security.
U.S. Navy officers stand guard aboard the Virginia-class fast-attack submarine USS Minnesota after the vessel docked at HMAS Stirling in Rockingham, Western Australia, on February 26, 2025, during a port visit. (Photo by COLIN MURTY/POOL/AFP via Getty Images)

The Pentagon’s AUKUS Review is an Opportunity — If Done Right

The success of AUKUS is important for validating and refining a kind of joint defense model that the United States can use to forge more productive partnerships.
France's Minister of Armed Forces Sebastien Lecornu (centre L) and US Secretary of Defense Pete Hegseth (R)

Hidden in the U.S. Army’s New Reform Initiative Is a Warning for Europe

Europe must accept that continued dependence on the United States is not viable and build a fully self-sufficient European defense.
Ukrainian rescuers work to extinguish a fire in a trolleybus depot following a drone strike in Kharkiv on May 30, 2025, amid the Russian invasion of Ukraine.(Photo by SERGEY BOBOK/AFP via Getty Images)

Can Trump Seize a Win in Ukraine?

It’s in Trump’s hands to deliver the logic of force: to rally the West, to back Ukraine, squeeze Russia, and set the stage for a win for Ukraine, the free world, and the U.S.
Missile system on the background of sunset sky

Doubts Concerning America’s Reliability Should Not Lead to a European Nuclear Deterrent

Stepping away from NATO would reduce U.S. leverage over European allies, potentially leading to more nuclear-armed states.
Bosnian Serb leader Milorad Dodik (C) delivers a speech flanked by Serbia's President, in Banja Luka, northern Bosnia and Herzegovina

Rubio’s Stance Against Bosnia’s Separatists Spurs EU to Act Too

The surprising US response to Bosnian Serb leader Milorad Dodik's provocations has spurred European leaders to take more decisive action.
The photo shows the leaders standing at individual podiums arrayed on a small stage in front of flags of each of their countries against a blue backdrop. The foreground shows the backs of the audience.

A Nordic ‘Trump-Mitigation’ Strategy Amid a Return of Power Politics

These Northern European States, with their Baltic neighbors, will play a vital role in supporting Ukraine and defending international law amid the emerging instability of the Trump…
Marco Rubio on stage at Trump Rally

Questions for Senators (and Journalists) to Ask Secretary of State Nominee Marco Rubio

Experts suggest questions for the Senate Foreign Relations Committee's confirmation hearing for Trump's pick for Secretary of State, Sen. Marco Rubio.
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