Complex sentence: The operation was conducted by three German armies striking in a pincer movement; the 9th Army from the northern side of the Kursk salient and with the 4th Panzer Army and Army Detachment Kempf from the southern side.
Split into simpler sentences: The operation was conducted by three German armies striking in a pincer movement. The 9th Army attacked the northern side of the Kursk salient, and the 4th Panzer Army and Army Detachment Kempf attacked the southern side.