Cyprus asks EU to put mutual defense back on the agenda
Quick Look
Cypriot President Nikos Christodoulides urged European Commission President Ursula von der Leyen to resume EU talks on the Lisbon Treaty's mutual defense clause, citing mounting geopolitical threats.
AI-generated summary
Why It Matters
Article 42.7 of the Lisbon Treaty outlines the mutual defense obligation for EU member states when faced with armed aggression.
The president of Cyprus wrote to European Commission President Ursula von der Leyen calling for the EU to resume talks on its mutual defense clause.
“I cannot overstate the importance of this provision for the EU and its Member States,
especially in times of geopolitical uncertainty,” Nikos Christodoulides wrote in a letter dated Oct. 20 addressed to von der Leyen, seen by POLITICO.
Article 42.7 of the Lisbon Treaty states that if an EU member is faced with "armed aggression," other members have an obligation to provide "aid and assistance by all the means in their power."
The defense clause article had risen up the agenda because of mounting geopolitical threats, including U.S. President Donald Trump’s undermining of the transatlantic alliance, Russia’s invasion of Ukraine and hybrid warfare campaign against the EU, and wars in the Middle East.
“Given the gravity of the challenges we face, Cyprus would welcome the resumption of
discussions at the relevant preparatory bodies. I would therefore appreciate an update on the
proposals under consideration, as well as a timeline for the next steps,” Christodoulides wrote.
The EU gamed out how the clause would work in practice with exercises earlier this year.
Cyprus’ six-month presidency of the European Council, which ended on June 30, prioritized the issue after Iranian drones struck a British base on Cypriot soil in March.
But the topic has largely fallen off the bloc’s radar, as the EU turns its attention to negotiating its seven-year, almost €2 trillion budget and finding more funding for Ukraine.
Article 42.7 is not scheduled to be discussed at any European leaders’ summits in the foreseeable future, confirmed an EU official, granted anonymity to speak freely.
Open Questions
- Will the European Commission respond to Christodoulides' letter?
- Will EU member states agree to put Article 42.7 back on the summit agenda?







