Why the UK and US are falling out over the Falklands

TL;DR

Trump may shift US neutrality on the Falklands toward Argentina, using it as leverage against the UK for refusing to support US operations in Iran.

Key Points

• 1.US support was decisive in the 1982 Falklands War. According to Assistant Defense Secretary Richard Perle, Britain would likely have lost without American air-to-air missiles, aviation fuel, and use of Ascension Island military stockpiles.
• 2.The rift stems from a Pentagon memo targeting NATO allies over Iran. Policy adviser Elbridge Colby reportedly listed reassessing US support for UK 'imperial possessions,' specifically the Falklands, as punishment for allies refusing basing and overflight rights for US Iran operations.
• 3.The current US position is officially neutral but leans slightly toward the UK. Since 1982, the US has recognised de facto UK administration while taking no sovereignty stance, but in 2015 affirmed it does not support Argentina's denial of Falkland Islanders' right to self-determination — 99.8% of whom voted to remain British in 2013.
• 4.Argentina's government has seized on Trump's signals to restate its claims. President Milei posted that 'the Malvinas were, are, and always will be Argentine,' and Vice President Victoria Villarruel told Falkland Islanders to 'go back' to England, calling them English people living in Argentine territory.
• 5.A policy shift remains unlikely in the short term due to structural and personal factors. Deep UK-US defence ties create institutional resistance, and Trump's fickle diplomacy is evidenced by him simultaneously suggesting the King's state visit 'absolutely could repair' the UK-US relationship.