As well as naval attacks, Nazi Germany bombarded Poland on land and from the air. The German air force - the Luftwafffe - launched bombing raids on Polish cities, including the capital, Warsaw.  The first assault on September 1 - operation Wasserkante - did not do as much damage as expected, because of low-lying clouds and fierce resistance from Polish fighter planes. Above: Burning grain stores in Warsaw after their attack by Nazi bomber planes
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