Basically, they’d run the whole show, and pass the tax requirement onto each country. Eventually...everything will become an EU initiative and no need for individual country legislatures.
May has sold the UK out
I am sure General Pershing refused to allow US troops under foreign command because of the fear that the French and the English, who had already suffered horrendous casualties, would opt to use US troops in situations likely to cause casualties. Even if the British and French didn’t do this, the perception at home would probably be that they had. This would have made Wilson’s and Pershing’s political situation untenable.
Now, imagine that under EU command French troops suffered casualties while other countries got off more likely. And, then there’s the case where troops are sacrificed for other purposes. In WW1 several campaigns were undertaken to relieve pressure from other fronts, not necessarily to gain ground. A Belgian or Polish commander sacrifices German troops when apparently equivalent Belgian or Polish troops were allegedly available. Wow, how will that play in Berlin and on the home front?
A centralized EU force under EU command might sound like good politics now. But it might fly apart under the pressure of war. The most dangerous political climate is that now, not one European power sees a war as even being possible. There effectively is no German navy and there aren’t enough spares to operate the army or air force at any real tempo for very long. Nothing brings war quicker than being unprepared to fight it.
Britain has a uniparty prob, too...
The two countries are Trump’s closest allies.
Defense force? Against what? The EU faces no invasion threat. This is about building a force for foreign adventures like Libya and Syria.
NATO?