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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.
Space wars. Weapons in space (via Getty images)

America’s Missile Shield Raises Legal and Cybersecurity Concerns

The Golden Dome raises urgent questions: What are the legal boundaries for weapons in orbit? How can the United States prevent cybersecurity liabilities?
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.
Pedestrians pass a combat vehicle

One Week of Trump’s DC Takeover Attempt: An analysis of the president’s use of military, police, and security services in the nation’s capital

Detailed legal analysis of federalization of DC police and the deployment of Guard, DHS and other forces.
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.
Members of the DC National Guard talk to a tourist outside Union Station as a storm approaches in Washington, DC, on August 17, 2025. US President Donald Trump on August 11 deployed military and federal law enforcement to curb violent crime in Washington, as he seeks to make good on his campaign pledge to be a "law and order" president. The Republican leader said he would place the city's Metropolitan Police under federal government control while also sending the National Guard onto the streets of the US capital. (Photo by Andrew Caballero-Reynolds / AFP) (Photo by ANDREW CABALLERO-REYNOLDS/AFP via Getty Images)

Trump, the National Guard, and the District of Columbia: What You Need to Know

The president’s maximalist legal approach in deploying the military may well foreshadow broader use of the military in other American cities.
U.S. Federal Bureau of Investigation (FBI) and Metropolitan Police Department (MPD) conduct a traffic stop near the U.S. Capitol

How to Truly Keep Washington, DC Safe: President Trump’s militarized approach undercuts what’s been working

The spectacle in DC is a warning: presidential authority is being stretched simply to grab power. History tells us that’s how liberty erodes.
The Just Security Podcast

Just Security Podcast: What Just Happened – Federalization of Law Enforcement in Washington DC

Carrie Cordero and Donell Harvin join David Aaron to discuss legal and policy considerations regarding federalization of law enforcement in DC.
Yemeni rescuers transport the bodies of victims pulled from the rubble of a building hit in US strikes in the northern province of Saada on April 28, 2025. Huthi media in Yemen said on April 28 that US strikes targeted a migrant detention centre in Saada, killing at least 68 people. (Photo by -/AFP via Getty Images)

In Preparing for Large-Scale Conflicts, States Neglect Lessons on Civilian Protection at Their Peril

A new assessment shows that, among the U.S., the U.K., and the Netherlands, none are prepared for the challenges of protecting civilians.
Israel's Prime Minister Benjamin Netanyahu gives a press conference at the Prime minister's office in Jerusalem on August 10, 2025. (Photo by ABIR SULTAN/POOL/AFP via Getty Images)

More of the Same, But Worse: Netanyahu’s “New” Plan in Gaza

The plan follows a consistent logic: it seeks to deepen territorial control of Gaza while denying the legal consequences that international law attaches to occupation.
Left Side: Rescuers from the Emergency Services of Ukraine extinguish a blaze in the aftermath of a Russian drone strike on a warehouse storing food products on August 9, 2025 in Sloviansk, Ukraine. (Photo by Pierre Crom/Getty Images) Right Side: An Israeli army infantry-fighting vehicle (IFV) leaves a cloud of dust as it moves at a position along Israel's southern border with the Gaza Strip on August 5, 2025. (Photo by JACK GUEZ/AFP via Getty Images)

From Ukraine to Gaza: IHL Compliance as a Tool for Preventing Moral Injury

Ukraine's voluntary IHL compliance report provides an opportunity to examine the concept of moral injury in armed conflict - Israel should follow Ukraine's lead.
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