The Poles hamper the German advance by blowing up bridges on their line of retreat, as shown in this photo.  Unfortunately such measures only afforded temporary relief.

The Poles valiantly slow the Germans

German soldier holding a captured Yugoslavian flag.Yugoslavia,October 1943.
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komandos10

JUGOSLAWIEN 1943

The Germans were fortunate in being able to make rapid progress before the rainy season, for Polish mud is notorious.  Even so, some of the roads were almost impassable, and, above, German transport is seen in difficulties on the way to the front in 1940.