Maybe everyone. The thing is that this battleground has been chosen not by us but by someone else. That is not good. You should always prefer to choose the time and place. Walking into a prepared battle zone with an enemy who has been planning a confrontation for ten or more years is not really the best battle plan. It is analogous to marching your solders in neat rows into firing musket balls.Who do you think the US is going to fight in addition to Russia?
It has been planned. There is bait, and we don't know who else is involved. Its not a dynamic situation, yet. It is someone's planned invasion which is also a trap.