The Strait of Hormuz, a crucial waterway situated between the Persian Gulf and the Gulf of Oman, has become the focal point of a escalating international crisis following the war between the US, Israel, and Iran. Since its effective closure last month, this vital corridor, responsible for transporting 20% of global oil production and 13% of global fertilizer exports, has triggered the largest oil supply shock in history, sending crude prices soaring above $100 a barrel with warnings they could reach $150 to $200. This disruption poses a severe threat to global energy markets and food production, particularly for Europe, which has struggled with energy security since cutting ties with Russia.

US President Donald Trump has vehemently urged allies, including the United Kingdom, France, China, and Japan, to send naval vessels to secure the Strait of Hormuz. He has threatened a "bad future" for NATO if members fail to respond, emphasizing that nations benefiting from the waterway have a responsibility to protect it. Trump initially described reopening the waterway as a "small endeavour," while Europeans countered that the reality on the ground is far more complex and risky given Iran's indiscriminate missile and drone activities.

Despite Trump's insistent calls, many key allies have either rejected or expressed strong reservations about committing military assets. Germany's Chancellor Friedrich Merz ruled out participation, stating, "This is not our war, we have not started it." Germany's Defence Minister Boris Pistorius questioned what a "handful of European frigates" could achieve that the "mighty US navy cannot manage alone." Likewise, France, Japan, Australia, and South Korea have no plans to send warships. UK Prime Minister Sir Keir Starmer indicated working on a "viable plan" but emphasized the UK would not be "drawn into the wider war." Italy's Foreign Minister Antonio Tajani stressed that "diplomacy needs to prevail," though he supported reinforcing the existing EU Aspides mission.

The European Union's response has been cautious. At a gathering of foreign affairs ministers, the primary topic was how to secure access to the Strait. Kaja Kallas, the EU’s foreign policy chief, proposed changing the mandate of Operation Aspides, an EU naval mission launched in February 2024 to protect commercial shipping from Houthi attacks in the Red Sea and surrounding waters. However, ministers expressed "no appetite" for extending Aspides' mandate to actively intervene in the Strait of Hormuz conflict, with Germany and Romania raising doubts about such a mission. They reiterated that "nobody wants to go actively in this war," preferring diplomatic solutions and a clearer understanding of US-Israeli war aims.

Several military options to reopen the strait have been discussed, each presenting significant risks. One approach involves escort operations, where allied warships would accompany oil tankers through the strait to clear mines and defend against Iranian attacks. This would require substantial naval resources and is militarily feasible but expensive and still might not convince insurance companies of safety. Another option is a ground invasion of southern Iran, potentially involving thousands of US Marines and a months-long operation to destroy missile and drone stockpiles at their source. The US has deployed up to 5,000 marines and sailors, along with the USS Tripoli, to the Middle East, signalling this possibility. However, the vast range of Iranian missiles and drones suggests that containing the threat might require occupying the entirety of Iran, a politically sensitive and militarily complex undertaking, especially with US midterm elections approaching.

A third strategy considered by the US involves holding Iran's Kharg Island, the central hub for 90% of its oil exports, to ransom. While the US reportedly struck military targets on the island, President Trump stated he refrained from destroying its crucial oil infrastructure, warning he would reconsider if Iran interfered with free passage through the Strait. Seizing control of Kharg Island could force Iran to halt attacks, but Iran has warned that any attack on its energy assets would trigger retaliatory strikes on the energy infrastructure of its Arab neighbors.

The conflict has also exposed divisions within the US administration. David Sacks, a close adviser to President Trump and czar for artificial intelligence and cryptocurrency, publicly broke with the President, warning of the risk of nuclear catastrophe and urging an "off-ramp" from the conflict. Sacks, aligned with Vice President JD Vance's reported position, called for a ceasefire or negotiated settlement, highlighting the neutralization of Iran's military capabilities. Trump himself has delivered contradictory messages, questioning the necessity of US involvement in the Strait given America's domestic oil production, even while demanding allies' assistance.

The cascading energy crisis has led to unorthodox discussions within Europe. Belgian Prime Minister Bart De Wever floated the idea of resuming Russian energy imports to alleviate the crisis, a proposal criticized by his foreign minister but supported by Italy's Antonio Tajani for a post-war scenario. However, other ministers, including Sweden's Ebba Busch and the EU’s energy chief Dan Jørgensen, firmly rejected the idea, reaffirming the bloc’s determination to avoid repeating past reliance on Russian energy.

As the international community grapples with the crisis, a quick resolution remains elusive. The ongoing threat from Iran's anti-ship missiles, drones, and "mosquito fleet," combined with the reluctance of many allies to engage militarily, underscores the complex challenges in securing the Strait of Hormuz. The emphasis remains on finding a viable, multilateral solution, preferably through diplomatic means, to prevent further escalation and stabilize global energy and trade flows.