Overview

• French President Emmanuel Macron and Polish Prime Minister Donald Tusk signed a comprehensive friendship and security treaty in Nancy on May 9, 2025.
• The treaty includes a mutual assistance clause and plans for joint military maneuvers, reinforcing Poland's role as NATO's eastern flank.
• Beyond defense, the agreement outlines collaboration in energy, infrastructure, and education, with discussions on a potential nuclear power project in Poland.
• This marks the first extension of Macron's bilateral alliance model to Eastern Europe, following similar agreements with Italy, Spain, and the UK.
• The treaty lays the groundwork for revitalizing the Weimar Triangle and accelerates negotiations on a German-Polish agreement proposed by Chancellor Friedrich Merz.