http://www.worldwar2database.com/html/poland.htm
The fort at Danzig fell on September 7, after a week of direct fire from German battleships.
http://www.onwar.com/chrono/1939/sep39/07sep39.htm
Thursday, September 7, 1939
On the Western Front... French patrols cross the frontier into Germany near Saarbrucken, marking the beginning of the Saar offensive. A total of 11 divisions advance along a 32 km frontage. There is negligible German opposition. The French mobilization is too slow and their tactical system too inflexible to permit any grander offensive operation. These gentle probes continue until September 17th when a larger advance is supposed to be made but is in fact cancelled because the Polish collapse makes it pointless.
In Poland... The Polish naval base at Westerplatte, a enclave in Danzig, surrenders after renewed German bombardment after being besieged since September 1st. The Polish command decides that it will be impossible to hold the line of the Narew River although the order to do so has only been in force for one day. The forces in the Narew area are to retire to the Bug River. The German Schleswig-Holstein begins daily bombardment of Hela, a Polish naval base.
In Berlin... Hitler meets with Admiral Erich Raeder, Commander-in-Chief of the Kriegsmarine, and orders that “in order not to provoke neutral countries, the United States in particular, it is forbidden to torpedo passenger steamers, even when sailing in convoy. Warfare against French merchant ships, attacks on French warships and mine laying off French ports is prohibited.” The order is in response to the sinking of the Athenia.
In Germany... The death penalty is decreed for anyone “endangering the defensive power of the German people.”
In London... General Viscount Gort, VC, is appointed to command the British Expeditionary Force.
In the North Atlantic... The first British Atlantic convoys set out. The convoy system has already been reintroduced on the East Coast. Although escorts can only be provided as far as 12.5 degrees west, they do provide effective protection against U-Boats. Many of the faster ships and some particularly slow ones do not sail in convoy at this stage or later in the war. During 1939, almost all U-Boat successes are from such “independents.”
http://en.wikipedia.org/wiki/Saar_Offensive
Saar Offensive
http://warandgame.wordpress.com/2008/09/10/french-invasion-of-the-saar-september-1939/
FRENCH INVASION OF THE SAAR, (SEPTEMBER 1939)
It would have been interesting to see what would have happened had Pilsudski survived until 1939.