Last month, Caroline Janney was a guest on C-SPAN's American History TV where she discussed her book Ends of War: The Unfinished Fight of Lee's Army after Appomatox, as well as the uncertainties in the military and politics following the end of the Civil War. 

https://www.c-span.org/video/?514706-1/ends-war

Caroline also received praise in a Wall Street Journal review for her book as she detailed how Robert E. Lee's surrender became foundational to the destabilizing myth of the "Lost Cause" and for offering a "fresh and disquieting version of Lee’s surrender, adroitly balancing official, political and military decisions with the recollections of the men on the ground who endured – and sometimes defied – its consequences."

https://www.wsj.com/articles/ends-of-war-review-the-myth-of-appomattox-11637104881