Tensions between Britain and Argentina have escalated this week as a decades-old dispute over the Falkland Islands has been reignited.
Argentina's firebrand president Javier Milei warned yesterday that sanctions would be imposed on companies drilling for oil off the Falklands, while insisting that the islanders have no right to self-determination.
With an election just a year away and his poll numbers falling, Mr Milei said Argentina must 'recover these islands' and vowed to use 'all the tools of the state: diplomatic, economic, judicial and legal' to obstruct drilling at the Sea Lion oilfield, which is estimated to contain 1.7 billion barrels of oil.
While he did not threaten military action, Mr Milei also announced an emergency decree to build a naval base on Tierra del Fuego, the part of Argentina closest to the Falklands.
The islands have remained a bitter point of contention since Argentina's 1982 invasion, which prompted Britain to send a task force 8,000 miles to retake them. A total of 907 people were killed in the conflict, including 255 British servicemen.
During the 1982 conflict, Argentina initially held a significant numerical advantage in the South Atlantic, with more than 200 aircraft and a garrison of around 13,000 troops on the islands.
However, its forces faced significant disadvantages, including limited training and logistical difficulties. Britain ultimately overcame Argentina’s numerical advantage through a combination of nuclear submarine power, the effectiveness of its Sea Harrier jets and the superior combat training of its professional infantry forces.
But more than four decades after the war, Mr Milei's renewed claims raise a fresh question – how does Argentina's military compare with Britain's today?
In 1982, Britain ultimately overcame Argentina’s numerical advantage through a combination of nuclear submarine power, the effectiveness of its Sea Harrier jets and the superior combat training of its professional infantry forces
According to the ATLAS Index, the UK has a substantial overall military advantage over Argentina, ranking eighth in the world compared with Argentina in 52nd place.
The UK scores 52.5 out of 100, compared with Argentina's 29.4, with Britain outperforming Argentina across all six pillars measured by the index.
These include defence budget, manpower, ground forces, naval power, air power and nuclear deterrence.
One of the clearest differences is defence spending – the UK has a defence budget of around £62.0billion, projected to rise to £79.1billion by 2029, compared with just £2.95billion for Argentina.
Defence spending accounts for 2.4 per cent of UK GDP, compared with just 0.6 per cent in Argentina.
The UK also has a larger active military, with around 183,000 active personnel, according to the latest Ministry of Defence figures, compared with 103,000 in Argentina.
Britain had a further 32,000 reserve personnel as of April 2026, while Argentina relies primarily on active-duty personnel and does not maintain a reserve force.
The biggest disparities emerge in air power. Argentina has between 215 and 241 military aircraft in total, including 101 helicopters, but only 32 combat aircraft.
The UK, by contrast, operates around 945 airframes across all categories, including 249 helicopters and approximately 171 combat aircraft.
Britain's air force also benefits from a significantly more modern and capable combat fleet.
The UK operates Eurofighter Typhoons and F-35B Lightning II fighter jets, alongside aircraft including the Voyager tanker, A400M and C-17 transport aircraft, and P-8A Poseidon maritime patrol aircraft.
The RAF had 129 Typhoons in its inventory in the latest Ministry of Defence figures, alongside its F-35 fleet.
Argentina, by contrast, has spent years operating an ageing fighter fleet but has now begun a major effort to rebuild its combat aviation capability.
Its combat aircraft inventory is considerably smaller and includes A-4 Skyhawks, while its acquisition of newer F-16s represents an effort to modernise its ageing fighter fleet.
Wildcat Helicopters from 815 Naval Air Squadron, flies past UK Carrier HMS Prince of Wales
Argentina operates the TAM, a locally produced medium tank that is undergoing a major modernisation programme
Meanwhile, Britain operates two aircraft carriers, HMS Queen Elizabeth and HMS Prince of Wales, while Argentina has none.
The two countries are surprisingly close when it comes to tanks. Argentina operates the TAM, a locally produced medium tank that is undergoing a major modernisation programme, while Britain's main battle tank is the Challenger 2, which is being upgraded to the new Challenger 3 standard.
Unofficial, non-government figures put Argentina's fleet at 231 main battle tanks, compared with 227 for the UK.
Britain has, however, a much broader fleet of armoured and protected vehicles. The Ministry of Defence's latest equipment statistics record around 4,000 combat-equipment platforms, including armoured fighting vehicles, armoured personnel carriers and protected mobility vehicles.
Argentina does not publish an equivalent figure. Its armoured forces are nevertheless undergoing a major overhaul, with the government moving ahead with plans to acquire 235 US-made Stryker 8x8 armoured vehicles.
Britain also has the larger and more sophisticated naval force. The Royal Navy operates destroyers, frigates, patrol vessels, mine-countermeasure vessels and other surface ships, supported by the Royal Fleet Auxiliary (RFA).
The latest Ministry of Defence figures count 52 Royal Navy surface-fleet vessels and 12 RFA vessels. Argentina operates a smaller fleet of frigates, corvettes, patrol vessels and support ships, with unofficial numbers placing the figure at around 42 vessels.
The UK's nuclear capability creates another major difference between the two forces. Argentina has no nuclear weapons, while the UK is estimated to possess 225 nuclear warheads, including 120 deployed warheads.
Britain's nuclear deterrent is based on its fleet of four Vanguard-class ballistic-missile submarines. It also possesses five attack submarines.
The disparity in military resources is also reflected in the two countries' wider economies. The UK has a GDP of approximately £3.03trillion, making it the fifth largest economy in the world, compared with Argentina's £510billion, placing it at number 26 worldwide.
However, Argentina has a landmass of around 2.78 million square kilometres, more than 11 times the UK's 244,376 square kilometres.
Argentina also has a coastline of almost 5,000km, while the UK's coastline stretches for approximately 12,429km.
Eurofighter Typhoons position for landing at RAF Coningsby
Argentina currently has 103,000 active military personnel
Remains of an Argentine Chinook helicopter shot down during the Falklands War
In his speech on Thursday, Mr Milei said that Britain is 'on a path of decline' with social, economic and immigration problems.
His comments come at a time when his own country is suffering a decline in manufacturing, major industrial job losses and mounting household debt.
As he urged Argentinians to unite behind his sovereignty claim, Mr Milei said Donald Trump was bringing 'winds of change' after the President hinted he would not back Britain if Argentina invaded the Falklands again, after Sir Keir Starmer did not support his war with Iran.
Mr Trump also suggested this week that Washington could review its longstanding neutral position on the sovereignty of the islands, which have been in British hands for centuries.
Mr Milei added: 'The Falklands are Argentine. Historically and legally. There can be no argument. They are part of the Argentine territory.'
'The islanders on their usurped territory do not have a legitimate right to self-determination and any argument on any such self-determination is invalid.'
Defence Secretary Wes Streeting responded by saying that Britain's commitment to the Falkland Islands is 'absolute and unshakeable' amid ongoing concerns about the UK's ability to defend them as they did in 1982.
'Milei's statement overnight tells us more about domestic politics in Argentina than it does about the Falkland Islands,' Mr Streeting said.
'The Falklands are British because Falkland Islanders choose to be British. Our commitment to the Falklands is absolute and unshakeable.'
President Milei insisted the Falkland Islands are 'facing a new threat' and claimed the UK has 'failed to heed' the call of the United Nations not to undertake 'unilateral actions' on the territory.
Downing Street said earlier this week that the UK's position on the Falklands was 'long-standing and unwavering'.
'Sovereignty rests with the UK, and the islanders' right to self-determination is paramount.
'The UK's position is clear. The islanders have repeatedly expressed their wish to remain a British overseas territory.'