Did they have dar bar in the war..NO
Yes.German radio & radar operators could quite often determine that something huge was going to happen even before Allied bombers even took off by increased radio transmissions from allied bases (bomber radio guys testing & tuning their equipment). On top of that, early warning radars had ranges well beyond 200km.---------And while I do not like the increased radar ranges in the MA, it's pretty clear that you are not asking for anything meaningful, you are just whining about the changes.
]But thats not considered a Dar Bar. Thats just an assumption. Incresed radio transmission doesn't mean it's a big mission, could be a few pilots just having a conversation. I think i''m right....
doesnt have to be hundreds, could be a small squadron moving bases or re-locating