Multiple European NATO members have begun restricting US military overflights and base access for operations connected to the US-Iran conflict, revealing growing reluctance among traditional allies to automatically support American-led military actions in the Middle East. Italy denied US aircraft permission to land at Sigonella airbase in Sicily for Middle East missions after the requests failed to follow established authorization protocols, with officials emphasizing that such use falls outside standard bilateral agreements and requires case-by-case parliamentary scrutiny. Prime Minister Giorgia Meloni's government has sought to frame the decision as procedural while underscoring ongoing strong ties with Washington, yet the move coincides with strong domestic anti-war sentiment in Italy. Spain has similarly closed its airspace and restricted use of joint bases like Moron and Rota for Iran-related strikes, prompting the departure of US aircraft, while Switzerland has rejected multiple flyover requests related to the conflict. These actions come as Secretary of State Marco Rubio warned in an Al Jazeera interview that "without the United States there is no NATO," signaling potential US reconsideration of its troop presence and commitments to European defense. The incidents highlight a deeper tension: European publics and governments are increasingly wary of entanglement in conflicts perceived as outside international legal norms, echoing historical opposition to the 2003 Iraq invasion but occurring in a more multipolar context where US hegemony faces greater pushback. This fracture, though downplayed in some mainstream coverage, suggests accelerating momentum toward European strategic autonomy and questions the sustainability of unconditional alliance backing for unilateral US campaigns.