European security officials said the continent must now assume full responsibility for its own defense as global powers reduce direct support.

This shift is critical because a perceived withdrawal of U.S. security guarantees leaves Europe vulnerable to great-power rivalry and regional instability. The transition toward strategic autonomy is no longer a theoretical goal but a necessity for survival.

In Berlin, NATO security expert Gerlinde Niehus and Professor Maximilian Mayer said the urgency of this transition was high during a recent briefing. They said the U.S. and other global powers appear to be turning their backs on European security interests. This trend forces the European Union and its members to develop an autonomous security strategy to protect their borders and interests.

This movement follows a pattern of escalating tension regarding the North Atlantic Treaty Organization. President Donald Trump previously portrayed the alliance as a "paper tiger" and said Europe was on its own in trying to secure the Strait of Hormuz [3]. Such rhetoric underscores the volatility of relying on external security umbrellas.

Despite these challenges, some officials believe the region has shown unexpected strength. Katarina Mathernova, the EU's ambassador to Ukraine, said Europe's support "has been more resilient than we could have dared imagine" [2]. This resilience is now being tested as the conflict in Ukraine evolves into a broader European struggle where survival cannot be the only aim [2].

Experts said the current geopolitical climate requires a fundamental redesign of how Europe handles military logistics, and intelligence. The need for this autonomy was highlighted in reports published throughout June 2026 [1, 2], suggesting that the window for a gradual transition has closed. Europe must now decide if it is ready to take a leading role within NATO or build a separate, comprehensive defense architecture to ensure long-term stability.

“Europe must assume responsibility for its own defence and security as global powers reduce direct support.”

The push for European strategic autonomy represents a paradigm shift in transatlantic relations. By moving away from a primary reliance on the U.S. security umbrella, Europe is attempting to mitigate the risks of U.S. political volatility and shifting priorities toward the Indo-Pacific. However, the success of this transition depends on whether EU member states can overcome internal political divisions to fund and coordinate a unified military front.