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WWIII air defence over Europe was supposed to have a forward zone of attack helicopters,A10, Frogfoots etc then a missile belt then an air defence zone patrolled by F15s . Maybe the Ukrainians could establish a missile belt and inch it forward, the Russians would do the same over their troops giving a defacto no fly zone.
The areas were split up like this to stop “friendly Fire” I don’t think anyone can identify a moving aircraft at 3km.
Stinger missiles should curtail tactical air power but LGBs probably allow attacks on supply lines from higher altitude.
If you don’t have s no fly zone it will be difficult for the Ukrainians to bring up supplies their lines of communication are far longer than the Russians.