n the early months of 1862, the Confederacy faced imminent
defeat. The Union’s naval blockade tightened, enabling the
North to ship the Army of the Potomac to the Virginia Peninsula in
March. The army’s commander, General George B. McClellan, was
slow and over-cautious, but his troop strength gave him a numerical
advantage to take Richmond. Meanwhile, in the Western Theater,
the Union at last found a fighting general in Ulysses S. Grant, whose
victories at Fort Donelson and Shiloh laid open the defenses of
Tennessee. To the south, New Orleans fell to a naval attack in April;
by June most of the Mississippi was in Union hands.
But as spring turned to summer, the Confederates fought back. A
spirited campaign by Jackson in the Shenandoah Valley drew Union
forces away from the drive on Richmond. Then Lee took command
of the Army of Northern Virginia and seized the initiative. He forced
I
Stalemate at sea
Hampton Roads sees the
world’s first engagement
between ironclad warships. In
the duel between USS
Monitor and CSS Virginia on
March 9, 1862, neither ship
inflicts sufficient damage to
defeat her opponent.
Second Bull Run
At the end of August 1862,
Manassas is the site of a major
Union defeat, for the second
time in the war. The victory
of the Army of Northern
Virginia at Second Bull Run
opens the way for Lee’s
Confederate troops to
invade Maryland.
Carnage in Virginia
In a series of battles to the
east of Richmond, Lee
drives the Union Army of
the Potomac back from the
Confederate capital. Known
as the Seven Days Battles,
the campaign puts an end
to the Peninsula Campaign,
although at the cost of over
20,000 killed and wounded.
EASTERN THEATER
Ma
tta
po
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Riv
er
James R
iver
Rapp
aha
nn
oc
k (^) R
ive
r
Po
to
ma
c (^) R
ive
r
James (^) R
iver
Sh
en
an
do
ah^ Riv
er
C
h
e
sa
p
e
a
k
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B
ay
A
T
L
A
N
T
I
C
O
C
E
A
N
A
p
p
a
la
ch
ia
n
M
o
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n
ta
in
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NORTH CAROLINA
Cape Charles
Cape Henry
York River
Delaware
Bay
NEW
JERSEY
DELAWARE
MARYLAND
PENNSYLVANIA
VIRGINIA
DISTRICT OF
COLUMBIA
Hampton
Portsmouth
Roanoke
Charlottesville
Petersburg
Harrisonburg
Fredericksburg
Lynchburg
Harpers Ferry
Manassas Centreville
Front Royal
Baltimore
Richmond
Philadelphia
Sharpsburg
WASHINGTON, D.C.
Winchester
R o c k y M o u n t a i
n
s
(^) Sn
ake River
(^) Col
orado River
P A C I F I C O C E A N
San Francisco
Santa Fe
Sacramento
Portland
Virginia
City
Salt Lake City
CALIFORNIA
OREGON
COLORADO
TERRITORY
WASHINGTON
TERRITORY
UTAH
TERRITORY
NEW MEXICO
TERRITORY
NEVADA
TERRITORY
CANADA
MEXICO
Union failure
The Battle of Antietam, fought at
Sharpsburg on September 17, is
the costliest single day’s fighting
in the history of the United
States. Union general George
McClellan—here consulting with
Lincoln—fails to prevent Lee’s
Confederates from withdrawing
from Maryland.
CLASH OF ARMIES
States of the Union
Territory gained by the Union
Confederate states
Territory gained by Confederacy
Disputed territory
TERRITORY GAINED BY DECEMBER 1862