Take a look at another of the tragic events for Czechoslovakia. Invasion of Czechoslovakia 1968, every 15 minutes.
These are mainly the main columns of the invasive army. It is probable that many of the villages that the troops passed through are not shown on the map.
Sources:
[ Ссылка ]
[ Ссылка ]
www.wikipedia.cz
www.valka.cz
Daily press of cities and districts
Many other mentions on the internet
(And not just one map found on Reddit...)
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