During the time he was operating in this way he killed, wounded and captured several times the number he ever had under his command at any one time.

He destroyed many millions of property in addition.

Places he did not attack had to be guarded as if threatened by him.

Forrest, an abler soldier, operated farther west, and held from the National front quite as many men as could be spared for offensive operations.

It is safe to say that more than half the National army was engaged in guarding lines of supplies, or were on leave, sick in hospital or on detail which prevented their bearing arms.
Then, again, large forces were employed where no Confederate army confronted them.