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October 10, 2024 21 mins

How did a single piece of lost intelligence change the course of the American Civil War? Join us in our latest episode as we explore the dramatic events surrounding the Battle of Antietam. We uncover General Robert E. Lee's daring invasion of Northern territory, aimed at relieving Virginia and swaying public opinion, and the astonishing fortune that handed Union General McClellan the plans to Lee's campaign. As the two armies clashed near Sharpsburg, Maryland, we paint a vivid picture of the carnage at the Cornfield, Bloody Lane, and Burnside's Bridge, where over 22,000 soldiers met their fate. Despite McClellan's failure to capitalize fully on his advantage, the battle's outcome set the stage for one of the most transformative moments in American history.

Discover how the aftermath of Antietam gave President Lincoln the momentum to issue the Emancipation Proclamation, turning the Civil War into a fight for freedom. We delve into the profound implications of this landmark document, from its role in bolstering Northern morale to its impact on international politics. Additionally, we reflect on the grim reality of the Union's defeat at Fredericksburg, highlighting the strategic missteps and brutal losses that defined the war's second year. This episode promises a gripping narrative of a nation at war, struggling to reconcile its identity and future amidst unprecedented turmoil.

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Episode Transcript

Available transcripts are automatically generated. Complete accuracy is not guaranteed.
Speaker 1 (00:06):
Welcome to Double Helix.
Blueprint of Nations, season 2,episode 2.7, blood and Freedom.
Welcome back to Double Helix,where we continue our deep dive

(00:33):
into the pivotal year of 1862, ayear that would see some of the
most significant and bloodiestbattles of the Civil War.
If you've been following along,you know that we've already
witnessed the horrors of Shilohand the shifting tides at Seven
Pines.
But as we move into the laterhalf of 1862, the stakes are
about to get even higher.
The Union and Confederatearmies, now hardened by months

(00:56):
of relentless combat, werepreparing for what would become
one of the most infamousconfrontations in American
history the Battle of Antietam.
Of the most infamousconfrontations in American
history, the Battle of Antietam.
This battle, fought onSeptember 17, 1862, would mark a
turning point not just in thewar but in the moral and
political fabric of the nation.
In this episode we'll explorehow the Battle of Antietam

(01:21):
unfolded, why it became thebloodiest single day in American
history and how its outcome setthe stage for President Lincoln
to issue the EmancipationProclamation.
The war was not just aboutpreserving the Union anymore.
It was evolving into a battleover the very soul of the nation

(01:42):
.
So settle in as we continue ourjourney through 1862 and
prepare to witness the brutaland transformative events that
would shape the future of theUnited States.
With the seven days battlebehind them and Richmond
momentarily secure, robert E Leewasn't content to merely sit on

(02:02):
the defensive.
No, lee was a man of action andhe had no intention of letting
Union forces catch their breathor regroup.
He had something far moreaudacious in mind an invasion of
the North.
Lee's decision to take the warinto Union territory was driven
by several factors.

(02:22):
First, he believed that asuccessful campaign in the North
could relieve pressure onVirginia, giving the war-torn
state some much-needed respite.
Second, a Confederate victoryon Northern soil could
potentially sway public opinionin the Union, bolster the peace
movement and maybe evenencouraged foreign powers like

(02:44):
Britain and France to recognizethe Confederacy.
And lastly, there was thematter of supplies.
Lee's army was perpetuallyunder-equipped, and a foray into
the fertile lands of Marylandand Pennsylvania offered the
prospects of restocking hisforces.
So in early September 1862,with his army bolstered by the

(03:07):
victory at Richmond and a stringof successes under his belt,
lee began his bold campaign intoMaryland.
His army, numbering about55,000 men, crossed the Potomac
River, heading north with highhopes and even higher stakes.
The invasion, however, did notgo entirely as planned.

(03:28):
As Lee's forces moved throughMaryland, they were met with a
somewhat lukewarm reception.
While there were certainConfederate sympathizers in the
state, to be sure, the majorityof Marylanders remained loyal to
the Union or were at least waryof the Confederate cause.
Lee's hopes for a widespreaduprising of Southern
sympathizers in Maryland justnever materialized.

(03:50):
And then came what must be oneof the most fortuitous blunders
in military history, at leastfrom the Union perspective.
As Lee's army spread out acrossMaryland, moving towards their
objectives, a Union soldierstumbled upon a copy of Lee's
orders, wrapped around threecigars, no less.
They had been carelessly leftbehind by a Confederate officer.

(04:14):
When these orders made theirway to General McClellan, he
suddenly had the most valuablepiece of intelligence any
commander could wish for theexact movements and plans of his
opponent.
Armed with this knowledge,mcclellan had a golden
opportunity to strike adevastating blow against Lee's
divided forces.
But, true to his cautiousnature, mcclellan hesitated.

(04:39):
Instead of moving swiftly toexploit the intelligence, he
delayed, allowing Lee precioustime to gather his forces.
Still, despite McClellan'scharacteristic sluggishness, the
two armies eventually met nearthe small town of Sharpsburg,
Maryland, just south of AntietamCreek.
What followed on September 17,1862, was the bloodiest single

(05:03):
day in American history theBattle of Antietam.
The battle was ferocious andchaotic, with waves of Union
troops launching assaultsagainst well-entrenched
Confederate positions.
The fighting raged across alandscape that would become
etched in the American memoryPlaces like the cornfield, the
Bloody Lane and Burnside'sBridge.

(05:25):
Each of these locations sawintense combat, with both sides
suffering horrendous casualties.
In the Cornfield, Unionsoldiers advanced through the
stalks of corn, only to be moweddown by Confederate artillery
and musket fire.
The Cornfield changed handsmultiple times during the
morning, becoming a killingground where entire regiments

(05:47):
were decimated.
At the center of theConfederate line, the sunken
road, soon to be known as BloodyLane, saw some of the most
brutal fighting of the day.
Union forces managed to flankthe Confederates, turning the
road into a death trap wherebodies piled up in heaps as a
relentless Union assault finallybroke through.

(06:08):
On the southern end of thebattlefield, union General
Ambrose Burnside's forcesattempted to cross a narrow
stone bridge over Antietam Creek.
The Confederates, positioned onhigh ground, poured fire down
onto the Union soldiersattempting to cross.
For hours, burnside's men wereheld at bay, suffering heavy
losses.

(06:28):
It wasn't until late in the daythat they finally managed to
forge their way across, only tobe met by a counterattack led by
Confederate General AP Hill,who had just arrived with
reinforcements from Harper'sFerry.
By the end of the day, thebattlefield was a horrific sight
Over 22,000 men had been killed, wounded or were missing More

(06:52):
casualties in a single day thanthe United States had ever seen.
The Union had managed to pushLee's forces back, but McClellan
, ever cautious, failed topursue and destroy the
Confederate army.
But McClellan, ever cautious,failed to pursue and destroy the
Confederate army, allowing Leeto withdraw back to Virginia.
Despite McClellan's failure todeliver a crushing blow, the
Battle of Antietam wasconsidered a strategic victory

(07:14):
for the Union.
The Battle of Antietam, thoughtactically inconclusive, marked
a turning point in the Civil War.
It was a day of reckoning wherethe brutal reality of the
conflict was laid bare and thestakes of the war became
unmistakably clear.
The Battle of Antietam, whilenot a decisive military victory,
provided Lincoln with themoment he had been waiting for.

(07:36):
It was a chance to transformthe war into a fight for human
freedom.
On September 22, 1862, just daysafter the bloody confrontation
at Antietam, lincoln issued thePreliminary Emancipation
Proclamation.
It was a bold move and one thatwould redefine the character of
the conflict, making it clearthat the Civil War was not just

(07:59):
a struggle to preserve the Unionbut also a moral crusade to end
slavery in the United States.
Lincoln's EmancipationProclamation declared that all
slaves in the rebellious statesshall be then thenceforward and
forever free as of January 1,1863.
However, it is important tonote what the proclamation did

(08:22):
and didn't accomplish.
It did not immediately free asingle slave.
It is important to note whatthe proclamation did and didn't
accomplish.
It did not immediately free asingle slave.
Its power was purely symbolicin the Confederacy where
Lincoln's government had noauthority.
The proclamation did not applyto slave-holding border states
like Kentucky, maryland andMissouri, which had remained

(08:42):
loyal to the Union.
Nor did it free slaves in areasof the Confederacy that were
already under Union control.
So, in essence, theEmancipation Proclamation
declared free those slaves whowere still beyond the reach of
the Union armies.
Yet the significance of thisdocument cannot be overstated.

(09:03):
The Emancipation Proclamationwas a powerful statement of
intent, signaling that theUnion's war effort was now
inextricably linked to the causeof abolition.
Lincoln, who had long struggledwith the issue of slavery, made
it clear that the eradicationof this institution was now a
war aim, made it clear that theeradication of this institution

(09:24):
was not a war aim.
The proclamation turned theCivil War into a moral battle,
one that was not just aboutpreserving the Union anymore,
but also about transforming it.
In practical terms, theEmancipation Proclamation had
immediate and far-reachingeffects.
First, it provided the Unionwith a new source of manpower.

(09:44):
As Union forces advanced intoConfederate territory, thousands
of enslaved people fled to theUnion lines, where they were
welcomed as contraband of war.
By the end of the war, nearly200,000 African Americans had
served in the Union Army andNavy, providing a critical boost
to the Union's fightingcapacity.

(10:06):
These soldiers, many of whomhad been slaves, fought with a
fierce determination, knowingthat the outcome of the war
would determine their ownfreedom.
The proclamation also hadsignificant diplomatic
implications.
Up until this point, theConfederacy had been hoping to
secure recognition and supportfrom European powers like

(10:28):
Britain and France.
Both of these nations hadstrong economic ties to the
South, particularly through thecotton trade, and the
Confederacy believed that theirdependence on southern cotton
would lead to diplomaticrecognition or even military
intervention.
However, the EmancipationProclamation made it difficult
for European powers to openlysupport the Confederacy without

(10:52):
appearing to endorse slavery, inparticular Britain, which had
abolished slavery in its ownempire in 1833, was unlikely to
ally itself with a nationfighting to preserve the
institution.
Lincoln's proclamation also hada profound effect on public
opinion in the North.
While there were certainlythose who opposed the idea of

(11:14):
emancipation, fearing that itwould lead to a social upheaval
or an influx of freed slavesinto the northern states, the
proclamation inspired manyothers.
Abolitionists who had longcalled for a war against slavery
, celebrated the proclamation asa significant step towards
justice.
It galvanized the anti-slaverymovement and provided a new

(11:36):
sense of purpose to the Unionwar effort.
However, not everyone wasthrilled with Lincoln's decision
.
In fact, the EmancipationProclamation further deepened
the divisions within the UnitedStates.
Northern Democrats, who hadlong been critical of Lincoln's
leadership, accused him ofoverstepping his authority and

(11:57):
transforming the war into aradical crusade.
Many fear that the proclamationwould prolong the war by
strengthening southernresistance.
In the South, the proclamationwas met with outrage and
defiance, confirming theConfederacy's belief that
Lincoln was determined todestroy their way of life.

(12:18):
Lincoln himself understood therisks that he was taking.
He knew that the EmancipationProclamation could cost him
political support and might evenjeopardize the Union's war
effort.
Yet he believed that it was anecessary step, a moral
imperative that could no longerbe ignored.
As he wrote in a letter to asupporter I am a slow walker,

(12:42):
but I never walk back.
The issuance of theEmancipation Proclamation marked
a turning point in the CivilWar.
It was a bold and controversialdecision, one that would have
far-reaching consequences forthe nation's future.
As we've said, the war was nolonger a battle about secession.

(13:02):
It had become a struggle overthe very being of America, over
trying to fix the original sin.
As the year of 1862 drew to aclose, the Union and the
Confederacy both bracedthemselves for what was to come.
The war had already claimedthousands of lives, and it was

(13:23):
clear that the fighting wouldonly intensify in the years
ahead.
The Emancipation Proclamationhad changed the stakes of the
conflict, but it had not broughtthe war any closer to an end.
The battles of the coming yearwould be some of the bloodiest
yet, and the nation wouldcontinue to grapple with the
immense challenges of war andemancipation.

(13:45):
To end this episode, we'll turnour attention to the battles of
late 1862, as the Union and theConfederate armies clashed in
some of the most brutalengagements of the war.
The road ahead would be longand difficult, but the die was
cast.
America was now fighting notjust for his future but for his

(14:06):
very identity.
As 1862 drew to a close, theUnion and the Confederate armies
were locked in a series ofbrutal and costly engagements
that tested the resolve of bothsides.
Two battles in particular standout as emblematic of the
immense challenges and thestaggering losses that
characterized the war in itssecond year the Battles of

(14:28):
Fredericksburg and the Battle ofStones River.
These battles will serve asgreen reminders that the path to
victory for either side wouldbe soaked in blood.
First let's look atFredericksburg.
First let's look atFredericksburg.
In December 1862, presidentLincoln, ever anxious for a
decisive victory, had appointedAmbrose Burnside as the

(14:50):
commander of the Army of thePotomac.
After McClellan's failure tocapitalize on the narrow Union
victory at Antietam, burnside,who had initially declined the
position, was now at the helmand eager to prove himself.
Unfortunately, burnside'senthusiasm was not matched by
his strategic acumen.
The plan seemed straightforwardCross the Rappahannock River,

(15:18):
capture the strategicallyimportant town of Fredericksburg
and then drive south toRichmond, the Confederate
capital.
However, logistical delays ingetting the pontoon bridges
necessary for the river crossingallowed Confederate General
Robert E Lee to fortify hispositions at the high grounds
behind Fredericksburg.
By the time the Union forceswere ready to move, they faced a

(15:39):
well-entrenched Confederatearmy.
On December 11, union forcesfinally crossed the river under
heavy artillery fire and begantheir assault on the town.
Over the next two days,burnside's order repeated
frontal assaults against theConfederate positions at Mary's
Heights, a strong defensiveposition with a stone wall at

(16:01):
its base.
The Union soldiers chargeduphill into a hail of
Confederate fire that mowed themdown in waves.
It was a slaughter.
One Union soldier later wrotewe might as well have tried to
take hell.
By the end of the battle onDecember 15, the Union had
suffered over 12,000 casualties,compared to fewer than 5,000

(16:27):
for the Confederates.
Fredericksburg was a crushingdefeat for the Union and it
demoralized the northern publicand army alike.
Burnside, who had staked hisreputation on this offensive,
was devastated.
He offered his resignation toLincoln who, perhaps realizing
the depth of the failure, wouldreplace him in a matter of weeks
.
But the war didn't take a breakfor the holidays.

(16:51):
Now, just as Union morale wasplummeting, another significant
engagement was unfolding inTennessee, and it was known as
the Battle of Stones River orthe Battle of Murfreesboro,
which began on December 31, 1862.
This battle was not as wellknown as some of the other major
battles of the Civil War, butit would prove to be one of the

(17:14):
bloodiest and most pivotal inthe Western theater.
Union General WilliamRosenkranz led the Army of the
Cumberland against ConfederateGeneral Braxton Bragg's Army of
Tennessee.
Both armies were nearly equalin size, each with about 40,000
men.
The battle was characterized byferocious fighting, shifting

(17:36):
lines and heavy casualties onboth sides.
The first day of the battle sawBragg launch a surprise attack
on the Union right flank,driving them back several miles,
but Ross and Kranz managed tostabilize his lines and prevent
a total rout.
On January 1st 1863, botharmies held their positions,

(17:57):
licking their wounds andpreparing for another round of
fighting.
The new year was ushered in witha grim standoff.
The next day, on January 2nd,Bragg ordered an assault on the
Union left flank, whichinitially succeeded but was
eventually repelled by a massiveUnion counterattack supported
by heavy artillery fire.

(18:17):
The Confederates, havingsuffered significant casualties
and realizing they couldn't holdtheir ground, retreated from
the battlefield on January 3rd,conceding a hard-fought if not
entirely clear-cut victory tothe Union.
The Union had lost over 13,000men, while the Confederates lost

(18:37):
nearly 10,000.
Lost nearly 10,000.
The Battle of Stones River wasone of the bloodiest battles of
the war, with a casualty rate ofover 30% on both sides.
The significance of Stones Riverlay in its timing and its
impact on Union morale.
Coming just days after thedisaster at Fredericksburg, the

(18:58):
victory at Stones River was amuch-needed boost for the North.
The victory at Stones River wasa much-needed boost for the
North.
Lincoln later wrote toRosencrantz saying I can never
forget, whilst I rememberanything, that you gave us a
hard-earned victory which, hadthere been a defeat instead, the
nation could scarcely havelived over.
Both Fredericksburg and StonesRiver were sobering reminders of

(19:21):
the immense human cost of theCivil War.
They illustrated the brutalnature of the fighting and the
strategic challenges that bothsides faced.
Fredericksburg was a lesson inthe dangers of frontal assaults
against fortified positions,while Stones River highlighted
the importance of perseveranceand the willingness to endure
heavy losses to achievestrategic goals.

(19:42):
As 1862 came to an end, both theUnion and the Confederacy had
suffered grievous losses, butthe war was far from over.
The battles of Fredericksburgand Stones River set the stage
for even more intense and deadlyconfrontations that would
follow in 1863.
The nation was now fullyimmersed in the conflict, with

(20:06):
no clear end in sight.
Next time, in Doval Helix,we'll explore how the war
continued to escalate in 1863,with battles like
Chancellorsville and Gettysburgperhaps the turning point of the
war and the growing role ofAfrican American soldiers in the
Union Army.
The war was entering a newphase, one that would bring even

(20:28):
greater challenges as thenations resolved to the limit to
endure.
Thank you for listening.
We will see you soon.
Hallelujah, his truth ismarching on.
Glory, glory, hallelujah, glory, glory, hallelujah, glory,

(20:53):
glory, hallelujah, his truth ismarching on.
It's true, it's Washington,washington.
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