Russia Ukraine war, page-211822

Nope. Wagner at that time was under the control of Piggy. Regardless, who had control of them does not change their nationality or where they fought.

Let's go through the definiton of a civila war again, it is:

A war between citizens of the same country. (just FYI, the definition of a war means "armed conflict", in case you wanted to ask)

Citizens of the same country? - Check

In armed conflict? - Check

I'll even add in this extra criteria to really emphasise it was a civil war, fighting in their home country against each othr? - Check

Civil war.