Complex sentence: The cutting edge of this powerful armored strike force was the 12th SS Panzer Division, which was allotted three of the five major roads allocated to the 1st SS "Panzer" Corps through the Ardennes forest, the major choke point of the entire drive east.
Split into simpler sentences: The cutting edge of this powerful armored strike force was the 12th SS "Panzer" division. This division was allotted three of the five major roads allocated to the 1st SS "Panzer" Corps through the Ardennes forest, major choke point of the entire drive east.