It's not going to be something useful like a power house though. It'll be a bunch of dudes simulating how to blow up poor third-world peasants in the most expensive way possible. In case the market demands that particular skillset. And who is going to command this lot? Von der Leyen? I'd rather not give an army to the aristocratic horse lady (again). She probably always wanted to order a cavalry charge against some peasants, so let's not give her the chance.

A European Army would be an interesting outcome, america would save a lot when it lost it’s bases there and became a regional power. Sure, the US would lose any say in a lot of matters that concern it, but they would learn, like the UK, to complain loudly and be ignored.