Transatlantic Security

A collection of RUSI research exploring different approaches and thinking on the challenges facing Transatlantic security today.



Transatlantic Security

President Donald Trump, right, meets with NATO Secretary General Mark Rutte | Associated Press, Evan Vucci


Overview

The alliances and certainties that have underpinned Western security since the end of the Second World War are under unprecedented strain. The stated US desire to secure control of Greenland, questions over the future of NATO and tariff disputes are all signs of a profound realignment in our international system.

This page includes links to a collection of RUSI outputs that explore different elements of the debate around Transatlantic Security today and the consequences of a United States foreign policy agenda radically different from that pursued over the preceding eight decades.

RUSI’s purpose is undertake research, encourage debate and provide options on critical topics of national and international defence and security. The commentaries, papers, records of media appearances and details of RUSI events collected here are your guide to a debate of critical importance.



  • Peace Through Strength – How is that Working Out?

    Peace Through Strength – How is that Working Out?

    clock13 Minute Read
  • NATO 3.0: US Conventional Retrenchment and Nuclear Deterrence in Europe

    NATO 3.0: US Conventional Retrenchment and Nuclear Deterrence in Europe

    clock11 Minute Read
  • As US Scales Back Forces Earmarked for NATO, Opportunity Opens for Europe

    As US Scales Back Forces Earmarked for NATO, Opportunity Opens for Europe

    clock7 Minute Read

Experts


Rachel Ellehuus

RUSI Director-General

Senior Management

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Jonathan Eyal

Associate Director, Strategic Research Partnerships

RUSI International

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Dr Neil Melvin

Former Director of International Security

International Security

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Ed Arnold

RUSI Senior Associate Fellow, International Security

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Matthew Savill

Director of Military Sciences

Military Sciences

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Oana Lungescu

RUSI Distinguished Fellow; RUSI Europe Advisory Board Member

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Ambassador Mitchell Reiss

RUSI Distinguished Fellow, RUSI International

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Events & podcasts

View all event recordings

  • Recording: Assessing the Outcomes of the 2026 NATO Summit

    Recording: Assessing the Outcomes of the 2026 NATO Summit

    clock60 Minute Watch
  • Recording: The Road to Ankara: A Stronger Europe, A Stronger NATO

    Recording: The Road to Ankara: A Stronger Europe, A Stronger NATO

    clock60 Minute Watch
  • Recording: Greenland: The New Battleground in US-Europe Relations

    Recording: Greenland: The New Battleground in US-Europe Relations

    clock60 Minute Watch
Episode 115: Can the Transatlantic Alliance Survive the Trump Presidency?

Episode 115: Can the Transatlantic Alliance Survive the Trump Presidency?

clock57 Minute Listen
Episode 114: How Will German Rearmament Shape European Security?

Episode 114: How Will German Rearmament Shape European Security?

clock53 Minute Listen
Episode 112: A New US Approach to the Caspian Region?

Episode 112: A New US Approach to the Caspian Region?

clock48 Minute Listen

Publications

Access our latest publications and filter by region, research group and by project.

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    Programmes

    Access related projects and programmes

    The Future Euro-Atlantic Security Architecture

    The Future Euro-Atlantic Security Architecture

    Renewing the Transatlantic Alliance for a New Security Era

    Renewing the Transatlantic Alliance for a New Security Era

    Global Security Briefing Podcasts

    Global Security Briefing Podcasts

    European Security in Transformation Programme

    European Security in Transformation Programme

    Shifting Security in Latin America Programme

    Shifting Security in Latin America Programme

    The Middle East, North Africa and Turkey in the New Global Order Programme

    The Middle East, North Africa and Turkey in the New Global Order Programme