Most Americans remember December 7 as Pearl Harbor Day. But the seventh haunts many World War II Ranger veterans for another reason: It marks the anniversary of one of the great untold small-unit actions of World War II — the Battle of Hill 400, the U.S. Army Rangers’ “longest day.†My new book, Dog Company: The Boys of Pointe du Hoc, chronicles that epic battle, as well as the other heroic efforts of this remarkable Ranger company.“Fix bayonets!†barked a hulking Ranger officer.In a scene reminiscent of a World War I battle, Germans and Americans stared at each other...