Supply Units

[Weasel]

Since we are on the topic of supply, I was talking to Antoni about supply percentile and it effect (or lack of) on combat units. In particular when we played the ROAD TO MOSCOW scenarios my German units were able to execute full movement and attacks at 2% effective supply (well maybe not full combat strength, but enough to push the Soviets back).

What I figure is a unit with such low supply, lets say any unit below 20%, should become fixed and eligible to conduct defencive operations only until its supply increases. But because I was able to continue to move and attack the Soviet counter attack actually became a Soviet retreat. How effective could a combat unit be when only 2 men out of 10 has ammunition, food, or clothing?

Does anyone know why units in such low supply levels are not really adversely affected?