David G. Martin (born February 8, 1949 in Michigan) is a game designer and author of American Civil War wargames and over 30 American Civil War books. He has a PhD from Princeton University and has been teaching in New Jersey.
Erroneous information that needs to be attached to a different David Martin...
David Martin has also illustrated Magic: the Gathering cards, for Wizards of the Coast. He began during production of the Mercadian Masques set, for which he illustrated the five artifacts in the Ramos cycle: Eye of Ramos, Heart of Ramos, Horn of Ramos, Skull of Ramos, and Tooth of Ramos.
You can see all of the Magic: the Gathering cards illustrated by David here: http://gatherer.wizards.com/Pages/Search/Default.aspx?action=advanced&special=true&artist=+[%22David%20Martin%22] Note that the gatherer database does not usually show promotional cards. The gatherer can also experience difficulties with links like this. If you are taken to an error page, click on "advanced search" at the top of the screen. Once on the advanced search page, scroll down to the artist search bar, input David Martin, then click "Add," and go back to the top of the page to click "Search." You should arrive at the page linked above.