Most European countries barely have a standing military to defend themselves, they're completely dependent on the USA for defense through NATO. And their leadership is so docile and complacent that I can't see them being able to muster up a strong resistance to any incursion, most likely if there was an actual invasion of The Hague they would let America do what they need to and try to return back to business as usual as quickly as possible. Again, they're not the types to think beyond the status quo.