This week, French President Emmanuel Macron unveiled the country’s new nuclear doctrine, emphasizing an increase in France’s nuclear arsenal and the extension of nuclear deterrence to allies in Europe. Macron's announcement marked a significant shift in France's nuclear posture, breaking long-held taboos about expanding the nuclear arsenal and reinforcing France's role in European security since the end of the Cold War.

During the introduction of this doctrine, Macron highlighted the need to strengthen nuclear deterrence against combined threats and considered the strategic implications of France's deterrence strategy within Europe. He stressed that France must gradually move towards enhanced deterrence in response to evolving security challenges. This reflects a broader response to geopolitical tensions, particularly following the Russian invasion of Ukraine, which has reshaped perceived threats in Europe.

France had previously sought to initiate strategic discussions about nuclear capabilities with other European countries back in 2020, but those discussions did not gain momentum. The current geopolitical climate, influenced by aggressive actions from Russia and changes in U.S. foreign policy under Donald Trump, has compelled France and its allies to rethink their defense strategies, particularly in the context of NATO's collective security principles and European defense cooperation.