"Or the border clashes between USSR and China."
I have read comments on FR that there are seismograph readings indicating that there were apparently small nuclear exchanges during part of this series of clashes.
"I have read comments on FR that there are seismograph readings indicating that there were apparently small nuclear exchanges during part of this series of clashes."Even a "small" nuclear exchange is a pretty big deal. I would not go that far, because they would leave a fallout residue (not to mention blast damage) of which we would definitely know by now. Pretty much all Soviet nuclear test and disasters were unveiled at the end of the cold war (beside Chernobyl there was also Kyshtym and the botched "Globus-1" civilian nuclear test in 1971 (similar to U.S. "Plowshare" series of tests, which contaminated a populated area.)) There were, however, nuclear land mines on the Sino-Soviet border.