through the use of anti-access/area denial weapons like mines and surface-to-air missiles at key infrastructure pieces like depots and rail yards. Those are the pieces that can’t easily be replaced or repaired during a war. Both the US and [Russian](https://en.wikipedia.org/wiki/Russian_Railway_Troops) army have entire units dedicated to the repair of rail infrastructure. 20 miles of straight rail isn’t going to be defended the same way as a bridge crossing a river is.
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