I don’t know, conventional norms seem to be put aside in times of war, act now, discuss the legalities later.
Ive heard many anti Trump pro Starmer commentators claim that NATO is a purely defensive force and can’t get into offensive wars as an excuse for not joining the war against Iran, but what about Bosnia ?
After the atrocity of Srebrenica, NATO entered the war against the Serb Republic,
None of the belligerents were members of NATO, so article 5 couldn’t have been enacted.
Apparently rules can be bent to fit the situation.
Cheers.