Why Trump’s NATO Allies Refused to Join the Iran War or Reopen Hormuz by Force

Trump’s dispute with Italy and Germany was not simply about whether European governments supported freedom of navigation. He treated their refusal to join the U.S.-Israeli war against Iran or help reopen the Strait of Hormuz by force as evidence that they were not meeting the obligations of NATO partnership. At the NATO summit in Ankara, he said the allies had been tested and questioned why the United States should continue spending heavily on an alliance whose members would not stand with Washington in a crisis. 89

The European response was to separate alliance solidarity from participation in a war they did not start. Italy, Germany, France and the United Kingdom rejected the idea of making the Hormuz operation a NATO combat mission. They supported safe passage and diplomatic efforts, but opposed being drawn into a U.S.-led blockade of Iranian ports while fighting continued. 21

What Trump said about Italy and Germany

Trump described Italy and Germany as having “let us down” after they declined to support the U.S. campaign against Iran. He framed the decision as a test of whether NATO partners would stand beside the United States, rather than as a narrow disagreement over one maritime operation. 89

He also warned that NATO could have “a very bad future” if allies did not respond positively to his demands for military help in the Strait of Hormuz. The broader pressure campaign included threats to reduce the U.S. military presence in Europe and repeated criticism of allies that Trump said were not contributing enough to collective security. 714

Italy became the most personal flashpoint. Prime Minister Giorgia Meloni refused to allow Italian bases to be used for U.S. military operations in the Iran war, and Trump said that decision had damaged their relationship—even while calling her a “nice person.” 15

Meloni maintained that Italy had followed a clear policy from the beginning of the conflict and said she had no regrets about it. Her position reflected a distinction shared by several European governments: remaining committed to the Western alliance did not mean making national territory or forces available for an expanding war with Iran. 35

How Germany and the UK responded

German officials rejected a NATO role in the conflict itself. Defense Minister Boris Pistorius said, “This is not our war; we did not initiate it,” while Berlin emphasized diplomacy and opposed military participation during the conflict.

The British position was more active but still carefully limited. Prime Minister Keir Starmer said the UK was working with partners on a plan to reopen the Strait, but would not be drawn into the wider war. Britain’s proposed contribution was described as strictly peaceful and defensive, and dependent on security conditions that would not turn the mission into escalatory combat. 22

France took a similar line. President Emmanuel Macron had described any French military involvement as strictly defensive, while Paris worked with London on a separate maritime initiative rather than seeking to activate NATO as an alliance. 417

This did not mean the European countries were offering no assistance to Washington or abandoning maritime security. It meant they were refusing to treat a discretionary military operation against Iran as an automatic NATO obligation. That distinction is central to understanding the dispute.

NATO is facilitating discussions, not commanding the mission

NATO’s later involvement has been deliberately limited. Supreme Headquarters Allied Powers Europe hosted a chiefs-of-defence video conference for interested allies to discuss possible national contributions to freedom of navigation in the Strait of Hormuz. NATO stressed that the meeting did not create a NATO mission. 19

In practice, the alliance is serving as a forum and coordinator. Individual countries may consider their own contributions, but the operation is not being conducted under NATO command or presented as a collective alliance intervention. A Reuters report described the arrangement as a way to use NATO’s coordinating strengths without formally making the waterway mission an alliance operation.

That structure allows governments to discuss escorts, logistics and maritime security while preserving their political and legal objections to joining the Iran war.

The separate France-UK maritime coalition

France and Britain have pursued a coalition of willing states to protect commercial shipping. The proposed mission is intended to be defensive, with escorts and other measures designed to reassure shipowners and restore freedom of navigation after fighting has ended or conditions have stabilized. 2022

The diplomatic effort has attracted broad international participation. France and the UK convened 51 countries at an April summit focused on freedom of navigation, international law, economic stability and energy security. 17

That initiative is deliberately different from Trump’s proposed blockade of Iranian ports. NATO allies said they would not support the blockade and instead favored an approach that would begin once active hostilities had ended. 21

Why the Strait of Hormuz matters

The Strait of Hormuz is a strategic maritime chokepoint for energy exports and international shipping. Reuters reported that roughly one-fifth of global oil supplies normally pass through the waterway. Any prolonged disruption can affect energy prices, shipping costs, insurance and freight markets. 21

The crisis has also been marked by conflicting public claims about whether the passage is open. Trump said the strait was operating, while Tehran said its naval blockade remained in force.

That uncertainty matters even when ships are not under direct attack. Shipowners, insurers and energy traders need confidence that vessels can pass safely and predictably. A nominal opening is not the same as a stable commercial route.

Why Iran’s consent is necessary for a lasting solution

A naval escort can protect some vessels, but it cannot by itself create a durable navigation regime. Iran controls one side of the waterway and retains the ability to threaten or impede traffic. Diplomats therefore judged that any lasting maritime arrangement would require Tehran’s consent.

This is why the European plan emphasizes diplomacy and post-conflict conditions. A forceful reopening without an agreement with Iran could become another front in the war, rather than a mechanism for restoring normal shipping. Reuters reported that Iran’s rejection of the proposed initiative made a breakthrough unlikely.

The practical problem is therefore political as much as military: the countries being asked to provide escorts want the conflict to stop, while Iran has rejected an arrangement it sees as connected to the U.S.-led effort.

What the dispute reveals about Trump’s NATO strategy

The Hormuz confrontation illustrates Trump’s broader method of pressuring allies. He has treated refusal to join U.S. military action as evidence of insufficient alliance loyalty and used the possibility of reduced U.S. support or troop deployments as leverage. 714

European governments, by contrast, have tried to preserve cooperation without accepting the premise that NATO must participate in every U.S. operation. Their position is not that maritime security is unimportant. It is that NATO’s collective-defense framework should not automatically cover a war initiated outside the alliance’s normal mission.

For now, the compromise is procedural rather than strategic: NATO can facilitate conversations, while France, Britain and other willing countries develop a separate defensive coalition. Whether that arrangement can restore regular shipping depends less on the alliance label than on a ceasefire, credible security conditions and Iran’s willingness to accept the terms.