The European Union's mutual defense clause is receiving new attention in light of questions over the US security commitment to Europe.
Issue Brief
May 29, 2026 • 11:14 am ET
James Batchik and Katherine Johnson
Bottom lines up front
Amid US military disengagement, the EU is considering how to put its mutual defense clause, Article 42.7, into use.The clause is not likely to replace NATO’s Article 5, but it offers an opportunity to bolster EU and transatlantic security planning.The EU’s military, financial, and humanitarian assistance to Ukraine should be the model the bloc follows in situations where it activates Article 42.7.
Several European leaders have called for a discussion on using the bloc's own mutual assistant clause amid US tensions
Article 42.7 had languished in obscurity for decades – until Donald Trump began casting doubt on US commitment to Nato
L'Ue discute sull'articolo 42.7, la sua clausola di mutua difesa. Ma tra vaghezza e timore di sovrapporsi alla Nato, resta tutto…
The fledgling ‘coalition of the willing’ assembled for Ukraine could form the basis for an urgent European security response,…
It is becoming increasingly apparent that a viable framework for European defense and security cooperation will require…
The US president has cast doubt on the US commmitment to NATO over members' response to the war in Iran.
