Complex sentence: Again promoted on 1 September 1942, to "General der Infanterie", Weiss led the German 2nd Army on the Eastern front from 3 February 1943 on.
Split into simpler sentences: Again promoted on 1 September 1942, "General der Infanterie" Weiß led the 2. Armee on the Eastern front from 3 February 1943 on.