Fall Weiss in Těšín area
On September 1, 1939, a small but industrially important part of Czechoslovakia from Bohumín to Jablunkov on the left bank of the Olza River, which was occupied by Poland and became part of it, did not witness fierce fighting on September 1, 1939. Despite its economic importance, the Poles did not intend to defend it steadily, but preparations for World War II and the course of its first day were recorded in municipal chronicles, Polish historiography, as well as in German war documents.