International Security & Defense

1270 Items

People practice combat skills in urban areas during a training course for national resistance of the Municipal Guard near Kyiv, Ukraine, on Jan. 19, 2024.

AP Photo/Evgeniy Maloletka

Journal Article - International Security

A “Nuclear Umbrella” for Ukraine? Precedents and Possibilities for Postwar European Security

| Winter 2023/24

Europe after the Russo-Ukrainian War must develop a new security structure to defend against any Russian aggression. The safest option is a non-offensive, confidence-building defense. This option includes proposals such as the “spider in the web” strategy and the “porcupine” strategy to provide for European security in a region threatened by Russian expansion—without relying on the threat of nuclear war. 

A Ukrainian serviceman looks at a monitor of an electronic warfare system

AP/Efrem Lukatsky

Analysis & Opinions - Foreign Policy

America Is Suffering From a Resolve Gap

| Jan. 30, 2024

Stephen Walt argues that if the world is entering a period of defense dominance—and if the resolve of most states is greatest in their immediate surroundings—then the ability of any country to wield vast and unchallenged global influence will decline. In such a world, the United States will have to pick its battles more carefully than it has in the past.

Houthi supporters attend a rally

AP/Osamah Abdulrahman

Analysis & Opinions - Foreign Affairs

Iran's New Best Friends

| Jan. 29, 2024

Mohammad Tabaar argues that the attacks on Red Sea ships unintentionally advance the Houthis agenda by allowing it to claim that it is fighting imperialism, and the attacks help Iran by fortifying its political foothold in the Middle East. Washington should therefore cease the strikes. It should, instead, work to halt the war in Gaza. The United States should also try to strengthen the region's diplomatic agreements and shore up its security framework. Otherwise, the Houthi-Iranian partnership will only grow stronger, as will Tehran's leverage in the region.

Image of Vladimir Putin standing in front of a podium

AP Photo

President Joe Biden delivers remarks about government regulations on artificial intelligence systems during an event in the East Room of the White House, Monday, Oct. 30, 2023, in Washington.

(AP Photo/Evan Vucci)

Policy Brief

Action on AI: Unpacking the Executive Order’s Security Implications and the Road Ahead

| Nov. 08, 2023

On October 30, 2023, President Biden issued the Executive Order on the Safe, Secure, and Trustworthy Development and Use of Artificial Intelligence, aimed at realizing the benefits of AI, while mitigating critical risks. This article provides an overview of its key national security initiatives and explores issues relevant to implementation.

Ukrainian soldiers sit on an armoured vehicle as they drive on a road between Izium and Lyman in Ukraine, Tuesday Oct. 4, 2022.

AP Photo/Francisco Seco

Analysis & Opinions - Belfer Center for Science and International Affairs, Harvard Kennedy School

Ukraine’s Defense: A Whole-of-Society Effort Demanding Additional Support

| Oct. 13, 2023

For Ukraine to maintain its defense and decisively thwart Russia’s invasion, it will take steadfast commitments from Western allies providing both state-of-the-art equipment and basic warfighting needs, local industry leaders and factory workers readying equipment for the frontlines and developing innovative technologies, and civilian volunteers tirelessly filling in the remaining gaps.

Russian Foreign Minister Sergey Lavrov, center right, and Iranian Foreign Minister Hossein Amirabollahian, left, attend a joint news conference

Yury Kochetkov/Pool Photo via AP

Policy Brief - European Council on Foreign Relations

Alone Together: How the War in Ukraine Shapes the Russian-Iranian Relationship

| Sep. 06, 2023

This policy brief explains how Russia and Iran have sought to upgrade their partnership through greater diplomatic support for pushing back on Western hegemony, mutual provision of key weapons systems, and sharing of expertise on evading sanctions.