President Donald Trump used his Truth Social account to sharply criticise NATO partners and Britain over their responses to recent tensions with Iran.
He accused allies of failing to assist the United States and warned they would be remembered for their lack of support.
He also urged Iranian negotiators to accept a settlement quickly, saying delay could lead to irreversible consequences.
Trump repeated previous complaints that some members of NATO have been reluctant to act alongside the US, calling into question the alliance’s effectiveness without American involvement.
The president singled out the UK, saying its permission for US operations from British bases was slower than expected.
Downing Street later confirmed that an agreement permits US defensive actions aimed at degrading missile capabilities used to threaten shipping in the Strait of Hormuz.
Iran’s foreign minister responded by saying that allowing US forces to operate from UK bases amounts to taking part in aggression.
The exchanges underscore growing tensions between Washington, its allies and Tehran, and reflect Trump’s continued willingness to publicly rebuke partners over security cooperation.
