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Schematic plan · American Civil War

Battle of Chickamauga

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A schematic plan, generated from the statistics of the CAA Database of Battles: the armies' size and width, the hours of fighting, the plan of attack and the outcome are as recorded; the ground and the positions are not.
Rolling, Mixed groundCentreCentreLeft wingRight wingReserveLeft wingRight wingReserveHorseHorseHorseHorseGuns02 km4 kmN

Confederacy (Cs Army of Tennessee, 66,326 men under Bragg) attacked USA (US Army of the Cumberland, 58,222 men under Rosecrans) in Georgia. The CAA Database of Battles records 23 hours of fighting on a front of 6.4 km, a frontal attack against hasty defense, and that Confederacy won. Losses: Confederacy 18,454 (28%), USA 16,170 (28%).

This plan is generated from those figures. It shows the shape of the battle the database describes: the size and width of the armies, the plan of attack and the outcome. It does not show where the units actually stood.

The armies

Confederacy

Bragg

UnitArmMen
Confederacy left wingInfantry13,998
Confederacy centreInfantry18,664
Confederacy right wingInfantry13,998
Confederacy reserveInfantry11,665
Confederacy cavalry of the leftCavalry4,000
Confederacy cavalry of the rightCavalry4,000
BraggCommander—
In this plan66,325

USA

Rosecrans

UnitArmMen
USA left wingInfantry10,688
USA centreInfantry14,250
USA right wingInfantry10,688
USA reserveInfantry8,906
USA cavalry of the leftCavalry5,000
USA cavalry of the rightCavalry5,000
USA artillery (246 guns)Artillery3,690
RosecransCommander—
In this plan58,222

What the sources report

ConfederacyUSA
Strength, this plan66,32658,222
Losses, this plan18,45416,170

In the CAA Database of Battles

CDB90 no. 200, “Chickamauga”, compiled for the US Army to study what decides battles. These are the figures a what-if engine can be calibrated against.

Fighting
23 hours
Winner
the attacker
Terrain
Rolling, Mixed
Weather
Dry, Sunny, Temperate, Autumn, Temperate
Defender’s posture
Hasty defense
Front width
6.4 km (attacker), 7.2 km (defender)
ForceStrengthLossesHorseGunsPlan and outcome
Confederacyattacker66,32618,4548,000—Frontal attack; Penetration; Pursued
USAdefender58,22216,17010,000246Defensive plan; Withdrew

Attacker’s advantages leadership +1 · intelligence +1 · initiative +1 · surprise +2

CDB90 (US Army Concepts Analysis Agency, 1990), tidy edition by Jeffrey B. Arnold; data under ODC-BY 1.0.

Notes

On this reconstruction

Generated automatically from the statistics in CDB90. Frontages, depths, distances, the order of events and the terrain are schematic: they follow the recorded strengths, front widths, hours of fighting, tactical plan and outcome, not maps or accounts of the battle. The sources give no hours; the timing is conjectural.

Sources

Facts gathered from Wikidata (CC0), Wikipedia (CC BY-SA 4.0) and Wikimedia Commons (licence per file); the plan and its text are timeastra’s own.