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Oil prices jumped back above $100 a barrel and global stocks fell after weekend talks between the US and Iran ended without an agreement and Donald Trump imposed a blockade of the Strait of Hormuz. The US president announced the blockade on Sunday, targeting Iranian vessels and ships that have paid a toll to Iran for passage through the strait, in an attempt to choke off the flow of Iranian oil.US Central Command said it would start at 10am ET (5.30pm in Iran and 3pm in the UK), blocking all Iranian Gulf ports and coastal areas, in effect seizing control of maritime traffic in the Strait of Hormuz. The news drove oil and gas prices sharply higher again, after the two-week ceasefire between the US and Iran announced on Wednesday prompted a sharp fall in energy prices, and crude ended the week below the psychological $100 a barrel threshold.Brent crude rose by nearly 7% to $101.74 a barrel on Monday morning, while US crude is up more than 8% to $104.69 a barrel. Gas prices also increased, with the British wholesale gas contract for May soaring by 11.7% to 122.5p a therm. Analysts at JPMorgan Chase said last week they expected oil prices to stay high in the second quarter, above $100 a barrel, before easing in the second half of the year.Most Asian stock markets fell on Monday, with Japan’s Nikkei down 0.7% and Hong Kong’s Hang Seng index losing 1%, while Chinese stocks rose slightly. Sentiment was helped by Beijing’s announcement of a 10-initiative strategy aimed at deepening ties with Taiwan. European stocks also fell, led by airlines including Lufthansa, Wizz Air, easyJet and British Airways parent IAG. The FTSE 100 index in London lost 0.4%, dropping 45 points to 10,555. Germany’s Dax fell 1%, Italy’s FTSE MiB slipped 0.7% and Spain’s Ibex was down 1.1%. With oil and gas prices rising sharply higher, energy companies such as BP and Shell are rallying.Priyanka Sachdeva, senior market analyst at the broker Phillip Nova, said: “In today’s environment, every barrel of risk added to oil markets carries an inflation price tag for the global economy.” She added: “The market reaction underscores a simple but powerful reality: Hormuz risk is not theoretical; it is structural, and it is real.”Interest rate expectations have shifted again; investors now see an 84% chance of two rate increases from the Bank of England this year to tackle rising inflation, up from 60% on Friday. Before the Iran war, the central bank was expected to cut rates. The price of gold fell 0.4% to $4,730.75 an ounce as the blockade fuelled inflation concerns, prompting traders to scale back expectations for Federal Reserve rate cuts this year.

The ongoing US-Israel war on Iran has taken a critical turn with Donald Trump's announcement that the US Navy would start blockading the Strait of Hormuz. This strategic waterway is crucial for global oil shipments, and any disruption could have significant economic impacts. In response, Iran's Revolutionary Guard warned that approaching military vessels to the strait would be considered a violation of the ceasefire. This development has led to a surge in oil prices, with US crude oil rising 8% to $104.24 a barrel and Brent crude oil increasing 7% to $102.29. The blockade, set to begin on Monday morning, will be implemented by US Central Command (Centcom) and will affect all maritime traffic entering and exiting Iranian ports. This move is part of a broader strategy that may include resuming limited military strikes in Iran, according to reports. The situation has drawn international attention, with Australian Prime Minister Anthony Albanese stating that his government has not been asked to participate in the blockade and is keen on continuing negotiations between the US and Iran. Meanwhile, Iranian parliamentary speaker Mohammad Bagher Ghalibaf dismissed Trump's threats, asserting that they would have no effect on the Iranian nation.

The US has announced plans to blockade the Strait of Hormuz, a vital waterway through which about 20% of global oil passes. This move comes after ceasefire talks with Iran ended without an agreement over the weekend. The blockade, threatened by President Donald Trump, aims to pressure Iran into reopening the strait, which has been effectively closed since February 28. Trump's announcement on social media stated that the US Navy will begin the process of blockading any and all ships trying to enter or leave the Strait of Hormuz. He accused Iran of 'WORLD EXTORTION' and threatened that any person who attacked US vessels would be 'BLOWN TO HELL!' However, the blockade's scope appears to have been scaled down, with US Central Command (Centcom) stating it would be confined to vessels transiting through Iranian ports, permitting passage of ships headed to ports belonging to America's Gulf allies. The blockade is set to come into effect at 10am ET (2pm GMT). The UK will not be involved in any blockade of the strait, and Australian Prime Minister Anthony Albanese has stated that his country was not asked to participate. Oil prices have surged following Trump's announcement, with US crude increasing 8% to $104.24 a barrel and Brent crude oil rising 7% to $102.29. Experts warn that the blockade could lead to higher oil prices, but much depends on its 'scope and implementation.' The managing director of research at ClearView Energy Partners, Kevin Book, noted that leaner volumes generally mean tighter markets and higher prices. Iranian and/or Houthi reprisals against Gulf producers' alternative routes could drive prices still higher. The blockade could cut off one of the Iranian regime's major sources of funding but might also have a short-term negative effect on global prices. About 100 tankers have transited the strait since the US and Israel started bombing Iran, most carrying Iranian oil products bound for China and India. Iran's Revolutionary Guards have stated that any warships approaching the strait to enforce a blockade would be considered in breach of the current ceasefire and would be dealt with strongly. Trump floated the possibility of a resumption of US strikes inside Iran, citing missile factories as one possible target.

The United States is expanding its military footprint in the Gulf as the US‑Israel war with Iran enters its second month. Since the Feb. 28 launch of Operation Epic Fury, a joint air campaign targeting Iranian military and nuclear sites, more than four weeks of strikes have resulted in thousands of casualties.Defense Secretary Pete Hegseth announced the deployment of a third aircraft carrier, the USS George HW Bush, joining the USS Abraham Lincoln, which is currently conducting daily combat sorties from the Arabian Sea, and the USS Gerald Ford, now under maintenance in Croatia.These carrier groups carry thousands of sailors, Marines and specialised support personnel, forming the core of the US’s power projection in the region.Carrier Strike Group (CSG) refers to an aircraft carrier plus its escort ships and support units that together function as a floating base. A typical CSG includes:An aircraft carrier60‑75 fighter jets and helicopters2‑4 Arleigh Burke‑class destroyersA guided‑missile cruiserA submarine for underwater protectionSupply shipsAs of April 1, the USS Abraham Lincoln remains the only carrier launching daily combat missions against Iranian targets, while the USS George HW Bush is en route and expected to eventually replace the Gerald Ford in the Mediterranean.Amphibious Ready Group (ARG) operates as a mini‑carrier, carrying US Marines and equipment for sea‑to‑land invasions. The USS Tripoli ARG arrived in the Middle East on March 27, and the USS Boxer ARG is expected to join the theater by mid‑April. An ARG typically comprises:Three specialised ships~2,200 Marines (a Marine Expeditionary Unit)Short‑takeoff aircraftLanding craft for beach assaultsThe key distinction: ARGs are built to land troops on shore, whereas CSGs are designed to project air power and conduct major naval warfare.A Marine Expeditionary Unit (MEU) is a rapid‑response, self‑contained force of 2,200‑2,500 Marine Corps personnel capable of combat and humanitarian missions. On Friday, US Central Command confirmed that 2,200 Marines from the 31st MEU arrived in Middle Eastern waters after departing Sasebo, Japan, on March 13. A second unit, the 11th MEU with roughly 2,500 Marines, is inbound after leaving San Diego on March 18.The Pentagon has also ordered about 2,000 soldiers from the 82nd Airborne Division to move to the region, adding to the approximately 50,000 US troops already stationed in the Middle East.An MEU is organized into four elements:Command Element – ~200 personnel for planning and command‑and‑control.Ground Combat Element – ~1,200 troops centered on an infantry battalion with artillery and armoured vehicles.Aviation Combat Element – ~500 personnel operating transport helicopters, attack aircraft and Osprey tilt‑rotors.Logistics Combat Element – ~300 personnel providing up to 15 days of self‑sustainment, including medical, engineering and maintenance support.MEUs are typically deployed aboard a three‑ship ARG, which serves as a floating base. The ships include:Landing Helicopter Assault/Dock – a small carrier carrying short‑takeoff aircraft such as F‑35Bs and attack helicopters.Amphibious Transport Dock – a mid‑size vessel transporting troops and heavy vehicles.Dock Landing Ship – primarily for cargo and heavy equipment.MEUs can execute sea‑to‑land assaults, raids, evacuations, humanitarian aid and disaster‑relief operations, and they are often the first forces on the ground in emerging conflicts.The US Marine Corps maintains seven active MEUs; the 31st (Asia‑Pacific) and 11th (West Coast) are currently assigned to the Iran war. The other units are distributed as follows:East Coast: 22nd, 24th, 26th MEUWest Coast: 11th, 13th, 15th MEUAsia‑Pacific: 31st MEUTypically, three MEUs are forward‑positioned at any time, rotating through deployments in the Mediterranean, Gulf and Asia‑Pacific regions.Historically, MEUs have played pivotal roles in US operations: during the 2001 Afghanistan invasion, the 15th and 26th MEUs conducted one of the longest amphibious vertical insertions; in 2003‑2004 they helped secure Iraqi ports and fought in Fallujah; and in 2024 they provided sea‑based support for the attempted abduction of Venezuelan President Nicolás Maduro.

The UK is set to host 35 countries, excluding the US, to discuss ways to reopen the Strait of Hormuz, a crucial shipping route for oil and gas that has been blocked by Iran. Prime Minister Keir Starmer announced that the next phase of discussions, led by the UK and France, will take place on Thursday, with Yvette Cooper, the foreign secretary, alongside international leaders.The meeting will focus on assessing viable diplomatic and political measures to restore freedom of navigation, guarantee the safety of trapped ships and seafarers, and resume the movement of vital commodities. British military planners will meet afterwards to discuss how to marshal their capabilities and make the strait accessible and safe after the fighting has stopped.The blockade has resulted in around 1,000 ships being stranded, with only about 130 ships passing through since the war began, compared to the normal daily number. The strait is a critical route, with a fifth of the world's oil and gas supplies and a third of global fertilisers passing through before the conflict.The US has not been directly invited to participate in the talks, which will include countries that signed a joint statement last month, such as the UK, France, Germany, Italy, and the Netherlands, as well as Japan, Canada, South Korea, and New Zealand. The Ministry of Defence has sent military planners to US Central Command to explore options for getting tankers through the strait.Iran's Islamic Revolutionary Guards Corps has stated that the Strait of Hormuz will remain closed to 'enemies of this nation', and US President Donald Trump has posted that there will be no ceasefire with Iran until it relinquishes control of the waterway.

The US-Israel war on Iran has entered its 30th day, with diplomatic efforts intensifying to bring an end to the conflict. Foreign ministers from Pakistan, Turkiye, Egypt, and Saudi Arabia are scheduled to hold talks in Islamabad, aimed at de-escalating the situation.The conflict has escalated across the Middle East, with Yemen's Houthis joining the war by firing missiles at Israel on Saturday. Tehran has threatened retaliatory attacks on Israeli and US universities in the region after the United States and Israel bombed Iranian universities.US-Israeli strikes have continued, with powerful explosions rocking Tehran on Sunday morning, killing two people and wounding five in a residential area. The Iranian Fars news agency reported that US-Israeli attacks also hit the Saadat Abad neighbourhood of northern Tehran and another residential area in the west of the capital.In the Gulf, Saudi Arabia intercepted and destroyed 10 drones in the early hours of Sunday, while the UAE Ministry of Defence said its air defences responded to missiles and drone threats. Emirates Global Aluminium reported that an Iranian attack on Saturday inflicted significant damage on one of its sites in Abu Dhabi and wounded six employees.Iran's power has been underestimated, according to Al Jazeera's Mohamed Vall, reporting from Tehran. He said that one month into the war, Iran has proved that its power was underestimated by the enemy, who thought that the war would be a short excursion and that the country would capitulate after just a few days of bombardment.The conflict has also led to protests in Lebanon, with protesters taking to the streets in Beirut after Israeli forces killed journalists Fatima Ftouni and her brother and colleague, Mohammed, of Al Mayadeen, as well as Al-Manar's Ali Shuaib on Saturday.In Israel, people took to the streets in Tel Aviv, rallying against the war and increased settler violence, as they clashed with police. The Israeli military announced the death of a soldier, Moshe Yitzhak HaCohen Katz, in southern Lebanon as Hezbollah's attacks on northern Israel continue.The US Central Command (CENTCOM) said some 3,500 additional soldiers arrived in the Middle East on board the USS Tripoli. The Washington Post reported that the Pentagon is preparing for weeks of ground operations in Iran, although Al Jazeera could not independently verify the report.

Israeli Defence Minister Israel Katz confirmed that an Israeli air strike killed Alireza Tangsiri, commander of Iran's Islamic Revolutionary Guard Corps (IRGC) navy, on Wednesday night. Katz stated that the assassination targeted other 'senior officers of the naval command'.Katz described Tangsiri as the man 'directly responsible for the terrorist operation of mining and blocking the Strait of Hormuz to shipping'. He added that Tangsiri was 'blown up and eliminated'. Tangsiri was a 'well-known commander' who shaped Iran's naval doctrine and developed drones for military maritime use. He was also involved in overseeing Iran's efforts to assert control over the Strait of Hormuz by blocking some vessels.Since the start of the US-Israel war on Iran on February 28, Israel has announced the assassination of several top Iranian officials. The civilian toll is significant, with at least 1,937 people killed, including 452 women and children, and 24,800 injured, according to Iran's Deputy Health Minister Ali Jafarian.Admiral Brad Cooper, commander of US Central Command, said the assassination of Tangsiri 'makes the region safer'. US forces have destroyed about 92 percent of Iran's large naval vessels in ongoing operations.

Alireza Tangsiri, the Islamic Revolutionary Guard Corps (IRGC) naval commander killed in an Israeli airstrike, was a veteran hardliner with a reputation for fiery rhetoric. He had a deep understanding of the strategic importance of the Strait of Hormuz, a critical waterway that carries a fifth of the world’s oil and gas.Tangsiri was a prominent figure in the IRGC, having won his credentials during the Iran-Iraq war and rising through the ranks to become the commander of the IRGC’s maritime force in 2018. He was known for pioneering unconventional weapons that allowed Iran to project power in the Persian Gulf and beyond.The US Treasury sanctioned Tangsiri in 2019 and 2023, citing his role in overseeing the IRGC Navy’s testing of cruise missiles and his involvement with a company that developed armed drones. These weapons could potentially be used to maintain the current blockade of the Strait of Hormuz.Tangsiri was also a strong supporter of fast boats, which can threaten civilian shipping and evade modern warship defense systems. His recent statements had dared the US to launch a ground assault on Kharg Island, Iran’s principal hub for oil exports, and warned of the impact on oil prices.The Israeli airstrike that killed Tangsiri has been seen as a significant blow to the IRGC. The commander of US Central Command, Adm Brad Cooper, said the killing “makes the region safer.” Israel’s Defense Minister, Israel Katz, described the strike as a “message” to the IRGC, vowing to “hunt you down and eliminate you one by one.”