War highlights strained alliances, unfettered militaries and a Washington with renewed appetite for regime change

• US-Israel war on Iran – latest updates

A joint US-Israeli operation that appeared to use nuclear negotiations as cover. Gulf leaders courting Donald Trump as he decided to launch a major Middle Eastern intervention. Europe boxed out and a G7 defence minister caught so off-guard that he was grounded in Dubai as the bombs fell. And from Moscow, a strongly worded condemnation of the missile strikes against a fellow member of the anti-US “axis of upheaval” – and little else.

The war unleashed by the US and Israel on Saturday has exposed the new rules of geopolitics in Trump’s second presidency, with strained alliances, unfettered militaries and a Washington that has regained its appetite for regime change.