Aside from a profusion of seldom-seen archival footage, this three-DVD collection of intended-for-television documentaries is valuable for going beyond the narrow confines of its topic. Sure, the Sherman, Tiger and T-34 tanks are described in detail. But on the strength of informative interviews with historians and a competent narration, “Historic Tanks & Battles of WWII” touches on larger themes of military strategy, technology and the rise of America from isolation to global military-industrial colossus.