I believe Putin is aiming to control all European energy: gas/oil/nuclear power plants.
He may threaten nuclear weapons, but his dream is to be Emperor of energy:
1- https://freerepublic.com/focus/f-news/4098888/posts
2- https://freerepublic.com/focus/f-news/4098887/posts
yes, that’s why it’s so important for Europe to cut its energy ties to Russia, so they can never again be held hostage by this monster
fortunately, this war has finally opened a lot of eyes in Europe as to the “eastern menace” they face