Apparently when the Russians occupied the red forest around Chernobyl, they had maps dated from 1985, so would have had no idea they were digging trenches, fox holes and bunkers in perhaps the most radioactive site outside of the sarcophagus itself in the exclusion zone. Plus their vehicles were churning up soil and throwing up clouds of irradiated dust as they blundered about. I saw OSINT accounts on Twitter reporting that before Russia pulled back from their advance on Kiev, that they were evacuating bus loads of soldiers from the Chernobyl site with acute radiation poisoning to field hospitals in Belarus, and that there had been deaths.
The question really is whether they had any clue whatsoever as to where they were and what they were dealing with, or if they’re really stupid enough not to see a problem with going digging about in the fallout from the world’s worst nuclear disaster. Give the Russian army’s shambolic performance thus far, it’s a coin toss as to which one describes this situation.