Considering what Trump just did in Venezuela and things that have been said and written Europe is going to have to fully arm itself independent of America. How should we invest?

With Monroe Doctrine 2.0 America is abdicating global hegemony and the post WW2 rules based order for something more like 19th century spheres of influence. With threats against Canada and Denmark the trans Atlantic alliance of NATO is dead in its current form. Europe is going to have to spend a lot of money to replace the hole American capabilities is leaving. Europe is looking at decades of investment to fully build the capabilities its economy can sustain. While America and China seize resources of other nations Europe is going to have to over come disadvantages if it wants to project power.

I know some history but dont know anything about European companies. Where should we invest?