By November , the situation of Guderian 's Panzer Group was dire .
The Group 's divisions had suffered heavy attrition since the beginning of invasion , and experienced shortages in fuel and ammunition due to the breakdown in logistics .
By November , the situation of Guderian 's Group   was dire .
The Group 's divisions had suffered heavy attrition since the beginning of invasion , and experienced shortages in fuel and ammunition due to the breakdown in logistics .