Cossacks Special Rules

[Midgard]

In Napoleon´s Russian Campaign user manual one can read the following
text about cossacks:
"Cossacks are a type of Cavalry found in Russian armies. These units have special rules applied to them in the case of Cavalry Charges"

I have read cavalry charges section but I have not found anything regarding cossacks special rules.

In battleground I now there was cossacks special rules
my question is:
Can any one kind enough to point me out all cossacks rules in campaign series?

Thanks in advance.