This is a book that I read a little over a decade ago when I was still in my early 20's, and really taking the study of military history quite seriously. It still stands as one of my favorite books not just on a campaign/battle of the War Between the States, but of military history in general.
The book is written lovingly, the narrative told with the grace and respect of someone deeply in love with the subject matter. The meat of the book, the Battle of Antietam itself, which runs a little over a third of the main narrative, is superb. Written in a fashion that not only clearly conveys what happened, and when, and by whom, but with just enough of a dramatic flair to make a layman fall in love with the subject, and an academic grind their teeth in envious frustration.
All of that said, to be perfectly clear and honest, where this book falls somewhat flat, and why it is a 4 and not a 5 star review despite being a long time favorite of mine, is that military history is at it's heart an analytical science. In no other aspect of the profession of history is there more need for dissecting why an event happened as it did, and extrapolating the immediate and carry on effects of said event as in the study of warfare. Like in the waging of warfare itself, it is both an art and a science. And Sears' book, while narratively gorgeous, is far too subsumed by biases and subsequent analytical flaws to be truly useful as anything more than an introduction to the 1862 Maryland Campaign.
Putting it bluntly, Sears despises General George B. McClellan. Throughout the course of the book, Sears takes every opportunity to snipe at, jab, and prod the Federal commander. Every success McClellan had in the Campaign, and there were more than the Lost Order episode, is chalked down to a happy accident. Every failure, of which there were many of those as well, as there always is, are occasions for Sears to showcase the cowardice, and near treasonous character of McClellan.
This view of McClellan held by Sears went on to influence other Antietam scholars and writers including the author of the relatively recent: Long Road to Antietam, who all but repeats, with a touch of hyperbole, Sears' analysis of McClellan as a threat to the Lincoln Administration. It is this, in my mind, unbalanced, and rather unprofessional personal grudge against McClellan that stains the reputation of an otherwise fine work of history.
Everywhere else, Sears has written a masterpiece. His conclusion that the campaign itself was a strategic victory for the North, is balanced by pointing out that the Confederates inflicted, overall, twice as many losses during the campaign, and that the 12 hour bloodbath of Antietam was a tactical Rebel defensive triumph. Sears rightly points out that Lee himself viewed Antietam as his greatest battlefield achievement of the war. And in his analysis of the Emancipation Proclamation, Sears points out what many historians still seem to overlook: it was a tremendously effective piece of Realpolitik.
The preliminary Emancipation Proclamation was an ideological shot across the bow of the European Great Powers, most of whom were eying the American war with keen interest and a lust for reestablishing European domination over North America. By framing the conflict in an ideological stance that it did not possess at the beginning, and that most on both sides in the ranks would disagree with anyway, Lincoln ensured that European intervention on behalf of the Confederacy would be seen as a defacto defense of Southern slavery.
And even if the Emancipation Proclamation itself freed not a single slave (only freeing the slaves in Rebel territory, while purposefully ignoring slaves held in loyal areas or those areas conquered with loyal slave owners), it shattered any hope the South had of Great Power intervention.
From here on out, Lincoln had ensured that the War would remain strictly an American one.
The book covers the story both from the perspective of Generals McClellan and Robert E. Lee and their respective Army of the Potomac and the Army of Northern Virginia. While far more time politically is spent in Washington than in Richmond, this is due more to the smoothness of the relations between the Confederate government and it's chief armies than that of Washington and theirs. The summer of 1862 saw the South go on the strategic offensive in all the theaters of the vast, continental wide conflict, the only time they would do so.
This reversal of Union fortunes practically everywhere, was the most dramatic in the East. Here the Army of the Potomac under McClellan had come within an ace of besieging the Rebel capital of Richmond and ending the Rebellion, until Lee took command of the ANV following Joe Johnston's wounding at the Battle of Srven Pines. Lee then reorganized the ANV, and went rapidly onto the defensive, throwing Little Mac back in a series of bloody, yet strategically successful offensives away from the environs of Richmond and rescuing the seemingly doomed CSA.
The Lincoln Administration organized a new army in northern Virginia, the Army of Virginia, under John Pope, in the hopes of squeezing Lee between two fires. However, McClellan's Army was in a bind on the Peninsula, and while Sears analyzes it incorrectly, McClellan's Army was ravaged by malaria and other weather and geographical related illnesses (including the decimation of the horses of the Army, which nearly wrecked it's logistics), making rapid movement in support of Pope genuinely difficult.
Lee and the ANV took advantage of McClellan's predicament, especially after it became obvious that Lincoln ordered him back north of the Rappahannock to support Pope in northern Virginia, to focus on Pope's Army. The ensuing campaign of Second Manassas saw Lee and the ANV win a dramatic, and decisive triumph against the AoV and large elements of the AoP, and shove them entirely out of Virginia.
Judging the strategic situation as crucial, and refusing the relinquish the initiative, Lee invaded Maryland, hoping to win another decisive victory, and secure Southern independence.
Alas, it was not to be. And while Sears is loath to admit it, McClellan deserves at least some of the credit for that outcome.
Taking command of the now combined armies, McClellan took a soundly thrashed force, hastily restructured it, reequipped it, and sent it into Maryland to monitor Lee's movements. There the famous Lost Order episode allowed McClellan to act with a celerity that he normally didn't show.
He caught Lee with his veritable pants down around his ankles. Lee's Army was divided into numerous detachments, seeking far too many, simultaneous, strategic rewards. The thin screen of Rebel infantry and cavalry, despite a hard fight, was soundly whipped in the Battle of South Mountain on 14 September, and Lee was forced to hastily concentrate his Army at Sharpsburg, a position that was far from ideal as the ANV had at it's back the Potomac River.
Although Stonewall Jackson successfully seized Harpers Ferry after a brief siege (and 11,000 Yankee prisoners and a treasure trove of war supplies), and raced towards the concentration point at Sharpsburg, McClellan still had a distinct numerical advantage over Lee, somewhat better than two to one with Lee having barely 40,000 men while the Federals could bring to bear roughly 85,000 men.
While Sears is correct in pointing out that McClellan's decision to bring battle on the 17th, rather than the 15th or 16th, allowed the ANV (minus AP Hill's Division) to muster along the banks of the Antietam across from Sharpsburg, it also rested his own men, and ensured that the entirety of the Rebel Army was before him, where it could be ground down in a deliberate battle of attrition.
McClellan understood the cultural character of the Federal Army, that it wasn't gifted for fancy maneuvers or snap changes in circumstances. It did it's best work in set piece affairs, where they could call the dances tempo, and ensure it stayed at a smooth, deliberate, yet steady, rhythm.
While Sears is correct in pointing out that the Federal plan fell apart throughout the day, and that the various Federal Corps fought practically isolated engagements from each other, the point is unmistakable that the Federal forces came within an ace of grinding the outnumbered Confederates to a blood soaked powder.
Even so, the Rebels put up a hell of a fight and, with the last minute arrival of AP Hill's Division, pulled out a tactical victory, although just. Despite the tactical success of the Confederate forces, the Army of Northern Virginia was a spent force having lost a quarter of it's force in a single day and nine General officers killed or seriously wounded.
Although Union losses were somewhat higher, and they too lost nine Generals, they had the resources to absorb such dreadful casualties, and enough unused reserves to ensure a decisive strategic success even if tactically the Confederates had, again, bested them.
And yet despite my issues with Sears' analysis, I cannot unlove this book. It is the first book on the 1862 Maryland Campaign I ever read, and it still stands as one of my favorites in my admittedly very large personal collection. Few works of military history are as well written as this one, and despite my complaints, I still reccomend this as a good work on the Campaign.
A very easy four stars.