The Germans underestimated our artillery. And they underestimated the effectiveness of our infantry against their tanks. This battle showed that tanks forced to operate in narrow quarters are of limited value; they're just guns without mobility. In such conditions nothing can take the place of small groups of infantry, properly armed, and fighting with utmost determination. I don't mean barricade street fighting-there was little of that-but groups converting every building into a fortress and fighting for it floor by floor and even room by room. Such defenders cannot be driven out either by tanks or planes. The Germans dropped over a million bombs on us but they did not dislodge our infantry from its decisive positions. On the other hand, tanks can be destroyed from buildings used as fortresses.