The Historical Novel Society (http://historicalnovelsociety.org/) reviewed Wayne Vansant’s history graphic novels BOMBING NAZI GERMANY and GRANT VS LEE recently, recommending both books to their readers. 
Reviewing BOMBING NAZI GERMANY in the February 2014 edition of the Society’s print magazine, Historical Novel Review, Helene Williams wrote in praise:
The minimal text is packed with information on politics, history, technical specifications, and military strategy, making this book appealing to both reluctant readers and those wanting a quick history review. Don’t rush through, though: the illustrations themselves are full of content and personality, conveying the human (and inhuman) aspects of war, from the Allied attack perspective as well as that of the beleaguered civilians on the ground.
Barry Webb’s review of Vansant’s GRANT VS LEE appeared in the same issue of Historical Novel Review:
As it’s been over half a century since I’ve read any comic books, I had a great deal of trouble getting up the gumption to read this thing – but once I did I was pleasantly surprised. The text is historically accurate and includes maps showing troop dispositions as it follows the battles between Lee’s Army of Northern Virginia and Grant’s Army of the Potomac during the war’s last year, from Petersburg, Virginia to Appomattox. The artwork is colorful, well done, and graphically shows the horrors of war. While the format may be aimed at the 8-16 year old group, the book can be enjoyed by us stodgy old adults as well.