Overview

• French President Emmanuel Macron and Polish Prime Minister Donald Tusk signed a treaty in Nancy on May 9, 2025, pledging mutual military assistance in the event of a threat or aggression.
• The treaty encompasses defense, energy, nuclear deterrence, and transport, marking a significant step toward closer bilateral ties between the two nations.
• The agreement opens discussions on extending France’s nuclear deterrent to Poland, highlighting Poland's strategic concerns over its proximity to Russia.
• Both countries reaffirmed their commitment to supporting Ukraine against Russia’s ongoing invasion, emphasizing European solidarity.
• The treaty reflects Europe’s broader push for strategic autonomy as doubts about long-term U.S. security guarantees persist.