Below is much of a small book by Colonel Dobrynin of the Don Host General Staff, written just after the civil war. It covers the sweeping campaigns back and forward across the territory of the Don as well as the main political events.
This material has been translated first into French and from that into English, so I cannot vouch for its accuracy. (For those that read Russian, I have seen a copy of the original on-line.)
It is presented largely for its information about the numbers of troops during the campaigns, about which Colonel Dobrynin was in a position to be well informed. Such material would not seem terribly subject to errors in translation.