As I said, it would be very difficult for Europe to send troops to Ukraine without the consent and support of the United States, and in the face of Russian opposition.
Just days after making a bold announcement they would send troops to Ukraine. On March 26, Europe withdrew the plan and said that the idea was no longer attractive with the current situation.
I don't think Europe will send troops to Ukraine anytime soon but Europe will prepare, EU countries have already increased their military spendings. I'm afraid to say this but I think that NATO will not last long this way, nor EU (maybe). There might come a time when every country will have to individually protect themselves.
I don't understand what Trump wants to do with the US and allies. It wants to start a war with everyone, including Canada (China included). I don't think US economy is strong enough to fight against the world, so the world will see his bluff. But the current world is very strange, people discuss and seriously take so many dumb subjects that it's ridiculous (I mean gender issues).