Port Gibson MS006

1863-05-01 to 1863-05-01 · MS · Grant's Operations Against Vicksburg [March-July 1863] · frozen result: Union · NPS summary (as listed)

CWSAC description
Maj. Gen. U.S. Grant launched his march on Vicksburg in the Spring of 1863, starting his army south, from Milliken's Bend, on the west side of the Mississippi River. He intended to cross the river at Grand Gulf, but the Union fleet was unable to silence the Confederate big guns there. Grant then marched farther south and crossed at Bruinsburg on April 30. Union forces came ashore, secured the landing area and, by late afternoon, began marching inland. Advancing on the Rodney Road towards Port Gibson, Grant's force ran into Rebel outposts after midnight and skirmished with them for around three hours. After 3:00 am, the fighting stopped. Union forces advanced on the Rodney Road and a plantation road at dawn. At 5:30 am, the Confederates engaged the Union advance and the battle ensued. Federals forced the Rebels to fall back. The Confederates established new defensive positions at different times during the day but they could not stop the Union onslaught and left the field in the early evening. This defeat demonstrated that the Confederates were unable to defend the Mississippi River line and the Federals had secured their beachhead. The way to Vicksburg was open.

Command responsibility (ledger v2)

US: Ulysses S. Grant

Grade A under rule 2; echelon army.

The description names Grant's force. Greene shows McClernand directing three divisions; that is subordinate context, not a contradiction (rule 2).

Major General
arnold-cwsac-commanders, battle MS006, belligerent US, fullname Ulysses S. Grant; column rank · snapshot 6c587c298717…
Grant's force ran into Rebel outposts after midnight
arnold-cwsac-battles, battle MS006; column description · snapshot 952b5d08402a…

Confederate: John S. Bowen

Grade A under rule 2; echelon unknown.

A cited passage states the command.

Brigadier General
arnold-cwsac-commanders, battle MS006, belligerent Confederate, fullname John S. Bowen; column rank · snapshot 6c587c298717…
I attempted, with two of Colonel Cockrell’s regiments, to turn the enemy’s right flank,
or24-1-bowen-selections-v1 · snapshot a61b6f5e8a3b…

Side strength (ledger v3)

US: grade B, 23,000 (19,550–26,450)

basis_mixedsingle_inputwhole_engagement_leakage

InputClassPrintedBasisBoundCodesPassage
us-greeneB23,000unknowndossier claim reported-force-scope
us-bowen-estbound20,000reported_engagedloweradversary_or_hearsay_estimateone_sided_bounddossier claim reported-force-scope

Confederate: grade B, 5,500 (4,680–5,500)

basis_mixedwhole_engagement_leakage

InputClassPrintedBasisBoundCodesPassage
cs-greene-returnsB8,500unknowndossier claim reported-force-scope
cs-bowen-reportB5,500unknowndossier claim reported-force-scope
cs-bowen-capbound5,500unknownupperone_sided_bounddossier claim reported-force-scope

Nested records

ContainingContainedOutcomeReason
Snyder's Bluff MS005Port Gibson MS006not_nestedPort Gibson was fought by Grant's army south of Grand Gulf; the Snyder's Bluff feint was on the Yazoo, north of Vicksburg.

Dossier claims

Draft dossier, revision vicksburg-1863-review-correction-2026-09-25. Claims are extraction records with their quoted passages, not historical adjudication. JSON

information

supportedunresolved Bowen telegraphed that 3,000 Federals were 10 miles from Port Gibson at 3 p.m. on April 30, and on May 1 that prisoners put the landed force at over 20,000, which he disbelieved. Greene says Bowen's wires failed after the Grand Gulf bombardment, and that Grant learned during the night of a good road to Port Gibson from Bruinsburg.

Attributed knowledge from telegrams and a history; no inspected message log.

Three thousand Eederals were at Bethel Church, 10 miles from Port Gibson, at 3 p. m., advancing.
or24-1-bowen-selections-v1, p.658 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…
that they all number over 20,000 men.
or24-1-bowen-selections-v1, p.659 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…
I dis- believe the report.
or24-1-bowen-selections-v1, p.659 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…
The wires then failed to work,
greene-vicksburg-1863-selections-v1, p.126 (OCR page markers; not checked against print) · snapshot 04879aee2029…
during the night he learned from a negro that there was a good road leading to Port Gibson from a land- ing-place called Bruinsburg,
greene-vicksburg-1863-selections-v1, p.125 (OCR page markers; not checked against print) · snapshot 04879aee2029…

logistics

supportedunresolved Bowen telegraphed that he was out of ammunition for cannon and small arms because the reinforcements' ordnance trains had not arrived, and later that want of ammunition was one of the main causes of his retreat. Greene says rations had not been issued to McClernand's corps before landing, causing a four-hour delay on the bank.

Supply statements from an interested commander's telegrams and a history; no inspected ordnance or commissary return.

We are out of ammunition for cannon and small-arms, the ordnance trains of the re-enforcements not being here.
or24-1-bowen-selections-v1, p.659 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…
Want of ammunition is one of the main causes of our retreat.
or24-1-bowen-selections-v1, p.660 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…
rations had not been issued to McCler- nand's corps before landing;
greene-vicksburg-1863-selections-v1, p.125 (OCR page markers; not checked against print) · snapshot 04879aee2029…
a delay of four hours occurred on the bank just after landing
greene-vicksburg-1863-selections-v1, p.125 (OCR page markers; not checked against print) · snapshot 04879aee2029…

objectives

supportedunresolved NPS says Grant crossed at Bruinsburg after failing to silence Grand Gulf and that the battle secured his beachhead. Bowen telegraphed that he would fight the Federals the other side of Port Gibson and hoped to hold until Baldwin arrived.

Stated aims from a summary and telegrams; NPS's beachhead judgment is campaign context.

Grant then marched farther south and crossed at Bruinsburg on April 30.
nps-ms006-v1, Description · snapshot 74a534115dbd…
the Federals had secured their beachhead.
nps-ms006-v1, Description · snapshot 74a534115dbd…
I will fight them the other side of Port Gibson.
or24-1-bowen-selections-v1, p.658 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…
hope to hold my position — 3 miles south of Port Gibson — until General [W. E.] Baldwin gets up.
or24-1-bowen-selections-v1, p.659 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…

outcome

supportedpost_outcome The frozen and live results read Union victory. NPS says the Confederates left the field in the early evening. Bowen says he was compelled to fall back just before sunset and crossed Bayou Pierre, destroying the bridges; Greene says the retreat was conducted in good order.

Retain the original result and engagement interval; later movements and campaign contribution are different measures. No new probabilities or individual causal credit.

Union victory
arnold-cwsac-battles, battle MS006; column results_text · snapshot 952b5d08402a…
Union Victory
nps-ms006-v1, Results · snapshot 74a534115dbd…
left the field in the early evening.
nps-ms006-v1, Description · snapshot 74a534115dbd…
I was reluctantly compelled to fall back.
or24-1-bowen-selections-v1, p.662 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…
The retreat was conducted in good order,
greene-vicksburg-1863-selections-v1, p.131 (OCR page markers; not checked against print) · snapshot 04879aee2029…

disputedpost_outcome The frozen casualty text reads 1,648 total (US 861; CS 787); the live field reads 1662 total (US 875; CS 787;). Greene gives Bowen's reported losses as 787 (60 killed, 340 wounded, 387 missing) and Grant's as 849, and says Union reports put Confederate prisoners at over 600 (OCR 'GOO'). Bowen's synopsis gives no estimate.

Original casualty returns were not inspected; preserve totals, categories, cutoffs and differences. No canonical reconciliation or casualty-based opening count; related actions must not be added without resolving population overlap. Three Union totals (861, 875, 849) differ; the Confederate 787 agrees across frozen, live and Greene.

1,648 total (US 861; CS 787)
arnold-cwsac-battles, battle MS006; column casualties_text · snapshot 952b5d08402a…
1662 total (US 875; CS 787;)
nps-ms006-v1, Estimated Casualties · snapshot 74a534115dbd…
Aggregate 787
greene-vicksburg-1863-selections-v1, p.131 (OCR page markers; not checked against print) · snapshot 04879aee2029…
Aggregate 849
greene-vicksburg-1863-selections-v1, p.132 (OCR page markers; not checked against print) · snapshot 04879aee2029…
According to the Union reports, the Confederates lost over GOO in prisoners alone.
greene-vicksburg-1863-selections-v1, p.131 (OCR page markers; not checked against print) · snapshot 04879aee2029…
I can give no estimate of losses, returns not having been handed in,
or24-1-bowen-selections-v1, p.662 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…

responsibility

supportedunresolved Greene says McClernand repeatedly asked for reinforcements although he had three divisions against about a brigade and a half, and that Grant sent McPherson to turn the Confederate right. Bowen says he attempted with two of Cockrell's regiments to turn the Union right, that Tracy was killed early, and that Baldwin, misled by the burning of the railroad bridge, took the wrong road and destroyed the north-fork bridge. The live heading ranks Grant Lieutenant General against the frozen Major General.

Subordinate and corps roles from a history and an interested report; the frozen commanders Grant and Bowen do not receive automatic sole credit. The heading rank is not adopted.

Owing to repeated requests for reinforcements from McClernand
greene-vicksburg-1863-selections-v1, p.130 (OCR page markers; not checked against print) · snapshot 04879aee2029…
was ordered by Grant to move it in such manner as to turn the Confederate right flank.
greene-vicksburg-1863-selections-v1, p.130 (OCR page markers; not checked against print) · snapshot 04879aee2029…
I attempted, with two of Colonel Cockrell’s regiments, to turn the enemy’s right flank,
or24-1-bowen-selections-v1, p.662 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…
He himself was killed early in the action.
or24-1-bowen-selections-v1, p.661 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…
General Baldwin, misled by the burning of the railroad bridge
or24-1-bowen-selections-v1, p.662 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…
unfortunately destroyed the bridge over the north fork of Bayou Pierre,
or24-1-bowen-selections-v1, p.662 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…
Major General
arnold-cwsac-commanders, battle MS006, belligerent US, fullname Ulysses S. Grant; column rank · snapshot 6c587c298717…
Lieutenant General Ulysses Grant [US]
nps-ms006-v1, Principal Commanders · snapshot 74a534115dbd…

strength

unknownunresolved

No inspected return establishes matched personnel at a common opening boundary. The frozen side-specific numerical strength bounds are blank (missing_numeric_strength). No figure in this pass is adopted as a simultaneous opening force.

disputedunresolved The frozen force field names the Army of the Tennessee (two corps) and one reinforced Confederate division of four brigades, without counts; the live field reads zero. Greene says Bowen's force numbered about 8,500 by the latest returns, that Bowen gave 5,500 in his official report, and that the Union force engaged was 23,000. Bowen's postscript to his May 2 synopsis says the enemy exceeded 20,000 and his own force did not number over 5,500; on the day he telegraphed that they outnumbered him trebly.

Returns, report and opponent figures differ in scope and source; none is adopted as matched opening strength. Greene dates the 5,500 to a report three months later, while the inspected May 2 postscript also gives it. Live zeros are not measured absence.

Army of the Tennessee (comprising two corps) [US]; Confederate forces in area (one reinforced division: four brigades) [CS]
arnold-cwsac-battles, battle MS006; column forces_text · snapshot 952b5d08402a…
0 total (US 0; CS 0;)
nps-ms006-v1, Forces Engaged · snapshot 74a534115dbd…
Bowen's force engaged in this action numbered about 8,500 men, according to the latest returns prior to the bat- tle.
greene-vicksburg-1863-selections-v1, p.131 (OCR page markers; not checked against print) · snapshot 04879aee2029…
In his official report, made three months later, he gave his strength at 5,500,
greene-vicksburg-1863-selections-v1, p.131 (OCR page markers; not checked against print) · snapshot 04879aee2029…
numbering in all 23,000 men.
greene-vicksburg-1863-selections-v1, p.131 (OCR page markers; not checked against print) · snapshot 04879aee2029…
the enemy’s force engaged exceeded 20,000, while my own did not number over 5,500.
or24-1-bowen-selections-v1, p.662 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…
They outnumber us trebly.
or24-1-bowen-selections-v1, p.659 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…

terrain

supportedunresolved Greene says the country was extremely rough and unsuitable for manoeuvres, cut by ravines filled with cane and underbrush, and that Green's brigade held an advantageous position on a commanding ridge. Bowen says the country and his men's condition forbade an advance.

Natural ground and chosen positions are combined while boundaries are unset; no map verification or numerical effect.

The country was extremely rough and unsuita- ble for manoeuvres,
greene-vicksburg-1863-selections-v1, p.127 (OCR page markers; not checked against print) · snapshot 04879aee2029…
separated from each other by ravines, filled with a dense growth of cane and under- brush.
greene-vicksburg-1863-selections-v1, p.127 (OCR page markers; not checked against print) · snapshot 04879aee2029…
The enemy (Green's brigade) was posted in an advantageous position on a commanding ridge.
greene-vicksburg-1863-selections-v1, p.128 (OCR page markers; not checked against print) · snapshot 04879aee2029…
The country and the jaded condition of
or24-1-bowen-selections-v1, p.658 (OCR page markers; not checked against print) · snapshot a61b6f5e8a3b…

Open questions