![Very Happy :D](./images/smilies/icon_e_biggrin.gif)
I moved up a couple motorized units north and just moved them straight through the norther supply lines and cut them off by turn 6/7, moved a Panzer division over around to the southern supply point around the same time, and by turn 11/12 the Red Army was starved and easy prey to just cut through.
Looks like the walkthrough already posted should get you there though!