How lawful is the Iran war?

No one believes that Iran was planning to attack the US and Israel imminently on Saturday a week ago, justifying the pre-emptive attack on Iran while negotiations were in progress between the US and Iran.

US foreign minister and national security adviser Marko Rubio put forward a convoluted case that the US attack was lawful, pre-emptive self defence. He claimed the Israelis had decided to go it alone, which meant that US forces in the region were bound to be attacked by Iran in retaliation, which forced America’s hand.