Earlier quoted context omitted.
While true, it is often ignored that combined EU does possess a huge, highly advanced and well trained military force. So more than that I'd hope EU can then put its squabbling aside and respong in unison to any military provocation as well.
Europe combined have more people and spend way more on military than US. On GDP Europe is lower, but they also have more than 2x the amount of people: https://www.nationmaster.com/country-info/compare/European-U...
The US is definitely overspending for no real benefit, except lining the pockets of defense contractors(and by that, politicians pockets)