T53
OMG was my original thought on seeing Brian's T52. Actually, that's not quite true but I don't want to break forum rules by writing rude words.
No triumph is ever so great nor any disaster as bad as first appears, and it became clear that B had put everything in the shop window without a lot of follow-on forces.
I had quite a lot of troops in the area inc. 6 panzer/mot xx + allies, and more have arrived. Last mud turn so it was a question of creating a containment perimeter to stop further advances, whilst preparing forces on both flanks to be ready to c/attack next turn. With luck Rostov '42 will be the new Kharkov '42.
I was able to convert remaining rail hexes around Krasnodar so there will be an alternative supply route next turn, tho' it will be blocked by the 1-5 tank xxx adjacent to the Rumanian 1-6 inf xx guarding the crucial junction bottom of screen in the middle