Trevor Beevor - Russia: Revolution and Civil War 1917 - 1921

Again, an Audible listen, but on the follow up to get a paper copy too. So much in it just to be able to "remember" (see below, an appropriate picture as the cavalry [how can I not say Cossack (Red and White)] played such an important part): 

The book comes with a warning, it will change what you thought you knew about the RCW, well at least foe me ii did. A long listen (23 hours) - horrifically fascinating, absolutely cruel in detail and so pertinent for today’s understanding of where Russia came from .. as well as understanding the Allied politics of WW2 much better.

Highly recommended!