He's got some very good audio episodes on ww1, ww2, the mongols. He gives a very good telling of the horrors of the conflicts and the passions that drove the wave of murders.
Just keep in mind that he gets away with lots of egregious mistakes about history in his podcasts by saying that he is not a historian but just an entertainer.
http://www.dancarlin.com/disp.php/hh
He's got some very good audio episodes on ww1, ww2, the mongols. He gives a very good telling of the horrors of the conflicts and the passions that drove the wave of murders.