It's subtler than that. Europe was just constantly reminded by its big brother not to duplicate NATO structures, which are dependent on the US.
This.
Plus, of course, each European country has to support their own defense industry, so each one of them needs to have their own howitzer/tank/whatever and they can't agree on common approach that would actually allow for the economy of scale.
This.
Plus, of course, each European country has to support their own defense industry, so each one of them needs to have their own howitzer/tank/whatever and they can't agree on common approach that would actually allow for the economy of scale.