Someone wrote a national column last year suggesting that whoever we elect to office should at the very least be able to pass a basic high school test in American history. The fact is, we all should be able to. If only because the past is prologue. Because where we are as a nation today, and the problems and privileges we embrace is a direct result of all that history.

Few have done more to help us understand our military history than Patrick O'Donnell.

In his latest book, The Unknowns: The Untold Story of America’s Unknown Soldier and WWI’s Most Decorated Heroes Who Brought Him Home, Patrick takes us back 100 years to a story that, while unique to itself, represents the fundamental reverence we should have as a nation for those that gave their last full measure of devotion.