How Europe Might Defend Itself If the U.S. Steps Back
A growing number of NATO countries have secretly begun working on a scenario in which Europe would have to defend itself without American involvement. This shift was triggered by a sharp reduction in U.S. military forces stationed on the continent and repeated remarks from Donald Trump questioning the alliance's Article 5 collective defense clause. The White House canceled a troop deployment to Poland with less than two weeks' notice, and Trump announced the withdrawal of 5,000 soldiers from Germany, prompting allies to explore backup plans for their own security.
In early May, soldiers from the Black Jack Brigade at Fort Hood, Texas, were preparing to deploy to Poland when the order was suddenly reversed. Since the start of his second term, Trump has cast doubt on U.S. commitments under NATO's Article 5, causing deep unease among allies. In response, NATO Secretary General Mark Rutte explicitly forbade any public discussion of a U.S.-free defense scenario, fearing it could worsen tensions. One insider said Rutte 'literally banned anyone from talking about it.'
Which Nations Could Form the Core of a New Coalition
Amid this uncertainty, the Baltic states, Scandinavia, and Poland are expected to form the nucleus of a northern European coalition. Major alliance members such as Britain, France, and Germany would almost certainly be drawn into any conflict, as roughly one-third of NATO members are prepared to act immediately regardless of Article 5. The most frequently mentioned alternative is the Joint Expeditionary Force (JEF), established in 2014 under British leadership. It comprises ten mostly Baltic and Scandinavian nations and is headquartered near London.
However, the JEF has notable gaps: it focuses on Scandinavia and the Baltics and excludes France, Germany, and Poland. As Luis Simón, director of the Centre for Security, Diplomacy and Strategy at the Free University of Brussels, noted,
“Without American leadership, we will likely see a fragmentation of the deterrence ecosystem.”
A Swedish defense official added,
“The Greenland crisis was a wake-up call. We realized we need a Plan B.”
Meanwhile, Edward Arnold, an expert at the London-based Royal United Services Institute (RUSI), stressed that 'no one is going to wait for the Portuguese to show up at the North Atlantic Council to debate this.' The situation has alarmed NATO members as they scramble to find effective ways to secure the continent in the face of shrinking U.S. backing.
These developments underscore a shifting geopolitical landscape in Europe and the challenges NATO countries face as American influence wanes. With continental security increasingly at risk, alliance members are forced to seek new formats of cooperation and alternative defense mechanisms. This may also lead to a rethinking of European security strategies and the strengthening of regional coalitions, especially given rising threats from Russia and other actors.
As NATO grapples with the implications of reduced U.S. military presence, understanding the alliance's contingency strategies becomes increasingly vital. To explore how NATO is quietly formulating a backup plan in response to these troop reductions, readers can refer to this detailed analysis of the evolving security landscape in Europe. Discover NATO's strategic alternatives and the potential shifts in defense dynamics.