Global war is a clash of systems, not just battalions biffing one another in some godforsaken forest.

I was born in Munich, and my father was stationed in Salzburg. For the first three years of my life, I lived in Austria back when the American Army was still in Austria. I grew up subsequently in posts around the country around veterans.

The U.S. Army records alone for World War II weigh 17,000 tons, and even the best historians have not done more than just scratch the surface. The story is such that 500 years from now people will be writing and reading about it.

The spring of 1942 was given over to a very impassioned, strategic debate about where we should first attack in counterpunching against the Germans and Italians. The British argued very persuasively on the part of Winston Churchill, prime minister, that this was a very green American Army, green soldiers, green commanders.

Almost everything about American society is affected by World War II: our feelings about race our feelings about gender and the empowerment of women, moving women into the workplace our feelings about our role in the world. All of that comes in a very direct way out of World War II.

There were almost 11,000 American soldiers killed in Germany in April of 1945, the last full month of the war. Thats almost as many as died in June, 1944. Right to the very end, it was absolutely brutal.

If Ive vividly laid out the narrative, the reader will come to his own conclusions.

There are a number of World War II historians I admire: Cornelius Ryan, Mark Stoler, Antony Beevor, to name a few. As for generals, there are those I admire as combat leaders and others I admire because they're great fun to write about.

In battle, topography is fate.

Hitler had a police state of the first order. And those who showed any sign of being weak-kneed faced prison or often summary execution. That prevented a lot of people who knew that the war was not going to turn out well for Germany from giving up.