I guess it’s not outside the realms of possibility that Russia may try to mobilise the entire army and invade across all borders with Europe. That and possible espionage and partisan activities travelling across the border.Indirectly related to that - one thing which was puzzling me for a long time was the activity of some of the NATO intel aircraft, which weren't just focussing on Russian positions - belatedly realised they are also frequently mapping/monitoring the lines where the West could be making a stand and/or staging from if this conflict escalated.