Analysts say sending a warship to patrol the Strait of Hormuz risks binding Australia to an incoherent and inflammatory US foreign policy. Australia’s announcement this week that it will join US-led freedom of navigation operations patrolling the Strait of Hormuz brings the number of American allies willing to contribute to America’s latest Middle East sortie to just three. The increasing tensions in the narrow, but critical, strait are almost universally regarded as an avoidable, US-created crisis, the result of Washington tearing up the Iran nuclear deal. “It starts and finishes with the US walking away from the JCPOA[the Joint Comprehensive Plan of Action on Iran]. We wouldn’t be in this situation if the US hadn’t acted in the way it has,” Rodger Shanahan, a research fellow with the Lowy Institute, told the Guardian. “There is a lack of faith in US foreign policy decision-making under President Trump,” Shanahan said. “The prospect of putting assets under a US command that has great capability but little coherent strategic direction does not excite many countries.” Few countries are willing to sign up to an incoherent US foreign policy – one that at once proclaims to be defending the international rules-based order while unilaterally tearing up an agreement (while imperfect) it had brokered and signed up to: essentially throwing the rule book away in favour of its realist “maximum pressure” on Iran through crippling sanctions. Unsurprising but disappointingAshley Townshend, the director of foreign policy and defence at Sydney University’s United States Studies Centre, said Australia’s decision to join the US operation was “understandable, unsurprising, but very disappointing”, one principally made to satisfy a political request from the Trump administration. He argued that while Australia has clear interests in freedom of navigation and in securing energy supply lines through the Strait of Hormuz, Australia “should urge the [Trump] administration to return to a sensible path of diplomacy, which is how this ordeal can and should end”. “America had a perfectly good deal with Iran to keep its nuclear ambitions in check – one that Australia and much of the international community supported. It was President Trump who tore it up. Canberra should condemn absolutely any coercion or use of force by Tehran in the Strait of Hormuz. But our focus should be on working with other like-minded countries to urge the White House back to the path of sensible diplomacy – one that will roll back the tensions created by Trump’s unilateral withdrawal from the Iran deal.” The narrow Strait of Hormuz is globally significant. A third of the world’s liquefied natural gas and almost 20% of global oil production passes through it. An increasingly unpredictable brinkmanship has emerged between the US and Iran since the US withdrew from the Iran deal in May 2018. Washington has pursued its “maximum pressure” strategy through economic and trade sanctions, while Tehran has responded by stepping up its nuclear program beyond the limits of the deal. In July off the coast of Gibraltar, British marines working with Gibraltan police seized an Iranian supertanker suspected of carrying 2m barrels of oil to Syria in breach of sanctions. Spain said the interception had been conducted at the request of the US. In an apparent reprisal, Iran then seized two oil tankers in the Strait of Hormuz, claiming the British and Liberian-flagged ships had breached maritime regulations. Less coalition of the willing than collection of the waryWhile the situation is deteriorating, there appears little enthusiasm for the US’s strategy. A month after the US secretary of state, Mike Pompeo, declared the US would build a “global coalition”, just three countries, the UK, Bahrain and Australia, have agreed to contribute. Germany has refused an entreaty to join, while France has said it would not contribute to a US-led mission, but might consider a European-led one. (France and Germany are also less reliant on oil shipped through the strait than other economies, so there is a weaker economic imperative.) But Australia is on board. The defence minister, Linda Reynolds, has insisted Australia’s contribution will be “modest, meaningful and time-limited”, aimed at “de-escalating tension in the gulf”. “This operation is designed to do itself out of business,” by ensuring freedom of navigation for shipping in the strait, she argued. Australia’s contribution will be modest: a six-month deployment from a Major Fleet Unit (a naval warship, such as an Anzac class frigate) next year; a P8 Poseidon aircraft that will assist in patrols for a month, beginning later this year; and Australian Defence Force personnel who will work in the International Maritime Security Construct headquarters in Bahrain.