I did know some German soldiers did attack before 1st September but does anyone have more info/can confirm this??:

http://www.wargamer.com/Hosted/steel...ghtarchive.asp

Poland, 26th August 1939, 0400 hours

The German attack on Poland was initially planned to start on August the 26th 1939. In advance of the first wave of invasion troops, several commandos of the Brandenburgers were intended to take control of vital points like bridges and crossroads in order to ensure a rapid advance through the Polish border defenses. The so-called "Deutsche Kompanie" (German Company) and the "KG Ebbinghaus" had orders to take the Jablunka pass, a railroad pass through a mountainous region in south Poland. KG Ebbinghaus mostly consisted of volunteer Sudeten-Germans that joined the Brandenburgers after the Czech overnment had to give the Sudetenland away in 1938. KG Ebbinghaus had highly motivated, though mere militiamen mostly depending on the well-trained Brandenburgers that reinforced them. Around midnight of August 25th 1939, Olt (1st Lt) Dr. Herzner and his men advanced to the Jablunka pass, led by some local German guides. The Polish posts, that had been spotted successfully, had to be taken out carefully to ensure control of the pass without anyone escaping to warn the Polish forces around the railway station of Mosty, a few km behind the pass. Hitler's order to stop "Operation White" came too late to reach the Brandenburgers. As a result, Dr. Herzner and his men started their own private war against the Polish army with no panzer division to follow thereafter.

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