NATO and Military Alliances
Alliances are a critical part of the Western way of war and an enduring source of strength. Our research examines the detail behind alliances’ success or failure.
If NATO, the Five Eyes intelligence community, the Five Power Defence Agreement, the Commonwealth and other alliances sit at the heart of any UK defence philosophy, why is so little attention paid to them between periodic defence reviews? And, conversely, if the current set of partnerships are deemed to be sufficient, why has there been a significant growth in new alliance structures and arrangements over the past decade?
Understanding the dynamics of alliances and partnerships is essential if we are to grasp how these agreements, which sit at the heart of national assumptions on defence and security, will need to evolve in the future.

Our research and commentary considers the role and impact of the North Atlantic Treaty Organization (NATO) and assesses the effectiveness of such military alliances in the modern world.
Our experts
Ed Arnold
Senior Research Fellow, European Security
International Security
Rachel Ellehuus
RUSI Director-General
Senior Management
Paul O’Neill CBE
RUSI Senior Associate Fellow, Military Sciences
Fellows
Lieutenant General Sir Nick Borton KCB DSO MBE
RUSI Distinguished Fellow
General Sir Adrian Bradshaw KCB OBE DL
Distinguished Fellow
Sir David Capewell KCB OBE
RUSI Distinguished Fellow, Military Sciences
Vice Admiral Patrick Chevallereau
RUSI Distinguished Fellow, Military Sciences
Eleanor Fairhurst
RUSI Associate Fellow, Military Sciences
Dr Alexander Gilder
RUSI Associate Fellow, Military Sciences
Professor Beatrice Heuser
RUSI Senior Associate Fellow, Military Sciences
Vice Admiral Peter Hudson
RUSI Distinguished Fellow, Military Sciences
Will Jessett CBE
RUSI Senior Associate Fellow, Military Sciences
Peter Jones CMG
RUSI Distinguished Fellow, International Security
His Excellency Vice Admiral Sir Jerry Kyd KBE
RUSI Distinguished Fellow, Military Sciences
Ewan Lawson
RUSI Associate Fellow, Military Sciences
Dr Peter Layton
RUSI Associate Fellow, Military Sciences
Dr Andrew Monaghan
RUSI Senior Associate Fellow, International Security
Professor Emma Parry
RUSI Senior Associate Fellow, Military Sciences
Air Chief Marshal Lord Peach KG GBE KCB DL
RUSI Distinguished Fellow, Military Sciences
Professor Peter Roberts
RUSI Senior Associate Fellow, Military Sciences
Natia Seskuria
RUSI Associate Fellow, International Security; Military Sciences
Jim Townsend
RUSI Senior Associate Fellow, International Security