I imagine that various armed forces have operational contingency plans for various types of armed conflict within Europe. If they don't, they are not doing their job.

Whether their political authorities have any clues about what they might do in such contingencies is debatable. In my view, they have a moral responsibility to formulate doctrine ahead of time, so they don't get overtaken by events. Because inaction is always tempting.

_{It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II}