World War 2: German invasion of Poland, 1 September 1939, using 45 German divisions and aerial attack. By 20 September only Warsaw held out, but final surrender came on 29 September.
World War 2: German invasion of Poland, 1 September 1939, using 45 German divisions and aerial attack. By 20 September only Warsaw held out, but final surrender came on 29 September.
Bildnachweis: Album / Universal Images Group / Universal History Archive