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The Ten Costliest Battles of the Civil War
Based on total casualties (killed, wounded, missing, and captured)


#1
Battle of Gettysburg
Date: July 1-3, 1863

Location: Pennsylvania
Confederate Commander: Robert E. Lee
Union Commander: George G. Meade
Confederate Forces Engaged: 75,000
Union Forces Engaged: 82,289
Winner: Union
Casualties: 51,112 (23,049 Union and 28,063 Confederate)


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#2
Battle of Chickamauga
Date: September 19-20, 1863

Location: Georgia
Confederate Commander: Braxton Bragg
Union Commander: William Rosecrans
Confederate Forces Engaged: 66,326
Union Forces Engaged: 58,222
Winner: Confederacy
Casualties: 34,624 (16,170 Union and 18,454 Confederate)


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#3
Battle of Chancellorsville
Date: May 1-4, 1863

Location: Virginia
Confederate Commander: Robert E. Lee
Union Commander: Joseph Hooker
Confederate Forces Engaged: 60,892
Union Forces Engaged: 133,868
Winner: Confederacy
Casualties: 30,099 (17,278 Union and 12,821 Confederate)


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#4
Battle of Spotsylvania
Date: May 8-19, 1864

Location: Virginia
Confederate Commander: Robert E. Lee
Union Commander: Ulysses S. Grant
Confederate Forces Engaged: 50,000
Union Forces Engaged: 83,000
Winner: Confederacy
Casualties: 27,399 (18,399 Union and 9)000 Confederate)


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#5
Battle of Antietam
Date: September 17, 1862

Location: Maryland
Confederate Commander: Robert E. Lee
Union Commander: George B. McClellan
Confederate Forces Engaged: 51,844
Union Forces Engaged: 75,316
Winner: Inconclusive (Strategic Union Victory)
Casualties: 26,134 (12,410 Union and 13,724 Confederate)


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#6
Battle of The Wilderness
Date: May 5-7, 1864

Location: Virginia
Confederate Commander: Robert E. Lee
Union Commander: Ulysses S. Grant
Confederate Forces Engaged: 61,025
Union Forces Engaged: 101,895
Winner: Inconclusive
Casualties: 25,416 (17,666 Union and 7,750 Confederate)


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#7
Battle of Second Manassas
Date: August 29-30, 1862

Location: Virginia
Confederate Commander: Robert E. Lee
Union Commander: John Pope
Confederate Forces Engaged: 48,527
Union Forces Engaged: 75,696
Winner: Confederacy
Casualties: 25,251 (16,054 Union and 9,197 Confederate)


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#8
Battle of Stone's River
Date: December 31, 1862

Location: Tennessee
Confederate Commander: Braxton Bragg
Union Commander: William S. Rosecrans
Confederate Forces Engaged: 37,739
Union Forces Engaged: 41,400
Winner: Union
Casualties: 24,645 (12,906 Union and 11,739 Confederate)


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#9
Battle of Shiloh
Date: April 6-7, 1862

Location: Tennessee
Confederate Commander: Albert Sidney Johnston/ P. G. T. Beauregard
Union Commander: Ulysses S. Grant
Confederate Forces Engaged: 40,335
Union Forces Engaged: 62,682
Winner: Union
Casualties: 23,741 (13,047 Union and 10,694 Confederate)


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#10
Battle of Fort Donelson
Date: February 13-16, 1862

Location: Tennessee
Confederate Commander: John B. Floyd/Simon B. Buckner
Union Commander: Ulysses S. Grant
Confederate Forces Engaged: 21,000
Union Forces Engaged: 27,000
Winner: Union
Casualties: 19,455 (2,832 Union and 16,623 Confederate)

This list looks familiar ... is it from "Attack and Die" by Jamieson/McWhiney?

I really don't remember . My favorites are filled with ACW sites

OK, may not make the top ten but, how about these impressive numbers.
On the morning of September 15, 1862 T. J. Jackson captured over 12,500 Union troops at Harpers Ferry – the largest single capture of Federal forces during the entire war. The Confederates also seized 13,000 arms and 47 pieces of artillery.Jackson captured over 12,500 Union troops at Harpers Ferry – the largest single capture of Federal forces during the entire war. The Confederates also seized 13,000 arms and 47 pieces of artillery.

In "Attack and Die" also, if I remember correctly, are statistics regarding the percentage of their men that the top Confederate und Federal generals lost in their bigger battles, i.e. whose strategy and tactics proved most costly in terms of casualties. The list is, somewhat misleadingly, led by Confederate General John Pemberton who lost 100% of his force when he surrendered his 29,000 strong army to Grant at Vicksburg.