SAN FRANCISCO — Does the history diet fed to Americans by Hollywood promote an unhealthy national memory? The latest screen epic about American heroism in World War II — the HBO miniseries "The Pacific" — is clouded by an unintended irony.

Creators Steven Spielberg and Tom Hanks, who teamed up also on "Band of Brothers" and "Saving Private Ryan," have sought to strengthen the authenticity of Hollywood renderings of World War II. But while such portrayals may give us a keener appreciation of the courage and suffering of U.S. troops on the battlefield, they also add further weight to a lopsided World War II history that leaves the dishonorable part of America's wartime behavior buried deeper in national amnesia.

In what may be added irony, the widely reported premier of "The Pacific" came but four days after the little noticed anniversary of one of the darkest events in American war history — the March 10, 1945, firebombing of Tokyo. The two-volume World War II history "Total War," by Peter Calvocoressi, Guy Wint and John Pritchard, describes the massive napalm attack on Japan's capital as not only "the greatest air offensive in history" but also "deliberate, indiscriminate mass murder."