We’re still not done with the Normandy Invasion.

The Longest Day is one of those iconic war movies (at least it was when I was growing up–I’m sure it’s something else, now) that every kid remembered when playing with plastic “army men,” most likely trying to recreate one or more of the many memorable scenes from it. Before I ever developed the patience to sit in front of a TV for two hours, I remember three or four times catching the scene with the squad of nuns who march calmly through a firefight to tend the wounded.

As a teenager I sat through the entire movie for the first time. It would not be the last. These days it’s hard to appreciate what an ambitious undertaking this production was–exceeded in scope perhaps only by the monumental event it depicts. It was also unprecedented to have so many big-name actors in one film; but it’s still a riveting movie even when you don’t recognize most of the star power.

Not only does this film warrant a permanent purchase, but the book it was based on is well worth a read, too.

Cornelius Ryan did a phenomenal job of investigative reporting in putting the book together. He interviewed hundreds of participants on both sides from lower enlisted up to the highest ranking generals (the supreme commander on the Allied side)–armies, navies and air forces. He took all the personal stories of that day and blended them together into a cohesive epic. And he did this before there was any such thing as cell phones, the Internet, social networks and so on. He had to physically investigate and track down witnesses. There was no Facebook or Classmates.com…or even a word processor for him to compile his data on.

And he did a helluva job. If you have even a passing interest in history, you really should read the book or at least watch the movie.

Many of the participants at the time remarked that there would never be another day like June 6 1944 in history, and they were right. The geopolitics will never resemble what it was then, and technology has ensured that war will never be fought that way again. Most would say we’ll never see another armada of that size either, but time will tell.