The Germans are certainly keen on that European Army idea: https://www.handelsblatt.com/today/opin ... cAmARB-ap4
Er, that is the current German Defence Minister in the current coalition government there. There are as many differences among politicians and the wider populations, and tendencies to change policy when facts change in all EU and other nations as in UK. But even the Minister says in that article that use of any 'combined' military force must remain under democratic control and constraint of each contributing nation:
"It would be counterproductive to scale back the involvement of Europe's national parliaments a time when Europe is struggling to earn new trust. Questions about the use of force are of such fundamental significance that they need the broadest legitimacy possible. Hence the decisive role of national parliaments, through their direct connection with citizens. It's no coincidence that the trend in Europe – and not just in the UK – is towards more democratic involvement, not less.
Nonetheless, to prevent this from impeding Europe's ability to act, parliamentary participation has to accelerate. I have therefore proposed forming a special committee at the European level, composed of members of national parliaments, which is to be informed early on about crisis scenarios as they take shape. That could speed up decision-making processes at the national level, as well as strengthen support for any military action."
Whereas, UK military forces can in theory and law be deployed and used under Royal Prerogative on direction of a single individual, the Secretary of State for Defence (or, in ultimate theory, the Sovereign). Parliamentary support for military action is not needed, and IIRC has been sought by UK Prime Ministers only twice, both recently, once accepted and once refused in Commons.
Concerted NATO military action, or national use of own forces committed to NATO, requires unanimous consent in North Atlantic Council, ie all member governments, even under Article Five invocation, aiui
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