What part of the UK did the EU rule over when we were in?
It really is nonsense to suggest the EU has primacy over the nation state, it just doesn't happen & in areas that it does, ie ECJ, member states have democratically signed up to these.
You seem to like to imply that the EU is some sort of foreign power, reality is it is run purely by its members.
Yes defence is indeed the sole concept on foreign policy, which is rather odd when you consider art 5.
I wonder how many people realise that if Russia attacked little Latvia, we would be obliged to defend Latvia with British blood and treasure, no debates, no vote in the commons... it has to happen.
Has the USA got this amazing intel gathering? what prior warning did they give to Israel? their strikes on the Houthis are certainly working... not!
then of course, the europeans didn't believe Iraq had WMDs the UK and the USA did.
The USA is not going to going in a mutual defence pact with the UK, thats ridiculous, would just drag them into another European war if we sent troops to the continent should Russia push further West.
No, if and its a big if, the US left Nato, we would be forced back into European defence pacts & the Europeans inc the UK, will need to get back to Cold War levels of spending.
BTW the UK is also one of these nations that doesn't spend enough on defence, to get to less than 2.5 of GDP (way below inflation) is to include things like pensions, peace keeping and redundancy payments.