I ran into his blog looking for some historical information on war horses, and he has written a bit about military horses, but it turns out he also literally wrote the book on urban warfare, FM 3-06, Urban Operations (2002). He is also the author of Concrete Hell: Urban Warfare from Stalingrad to Iraq (2012), which looks fascinating. On his blog, he writes that:
Two areas where I think this book breaks new ground is the evaluation of the Israeli Operation Defensive Shield (2002) and the look at US forces in the Battle of Ramadi (2006-7). I think Concrete Hell is the only comprehensive look at these operations currently in print.
Ultimately, what I intended, and what I think Concrete Hell achieves, is a thorough look at the evolution of urban warfare over the last fifty years. By isolating and focusing on this history, and what it tells us in terms of the conduct of warfare, I think Concrete Hell also describes the nature of the most important battlefield of the 21st Century: the urban battlefield. Thus, though a history, Concrete Hell presents not only an accounting of the past but a vision of the future. Recent battles in Lybia and current fighting in Syria seem to validate that vision.
For those with an interest in the Civil War, he has also written "Anatomy of a Failed Occupation: The U. S. Army in the Former Confederate States, 1865-1877," published by the Army's Land Warfare Institute.
He hasn't posted anything new to the blog for about two years, but it has some interesting stuff.
UPDATE: I assume the connection between Corb Lund and war horses is obvious to the regulars here, but for everyone else, here's the missing link:
UPDATE 2: OK, since I'm randomly finding stuff on horse soldiers this evening, I discovered that NYT columnist and economist Paul Krugman is a Civil War buff and U. S. Grant fan. Back in 2013 he wrote about the John Wayne movie The Horse Soldiers that was based on Grierson's Raid.