Grand Gulf MS004

supportedunresolved Greene says Bowen reported on April 28 that troop-laden transports and barges were landing at Hard Times, but that Pemberton was not entirely convinced the movement was not a feint covering Haines' Bluff. Bowen reported during the bombardment that he could not tell the effect of his shots.

Attributed knowledge from a retrospective history and a same-day telegram; no inspected message log.

supportedunresolved Greene says it was impossible to bring transports loaded with men in front of the batteries, so the troops marched across the point and the transports slipped by under a renewed bombardment after dark; NPS agrees. Bowen's telegram dated April 30 reports six gunboats with two transports lashed to them passing his batteries 'to-night between 9 and 10'.

Movement constraints from a history, a summary and one telegram; the telegram's date and 'to-night' are not reconciled with the night of April 29 here.

supportedunresolved NPS says Porter meant to silence the guns and then land McClernand's troops from the transports. Greene says Grant watched from a tug to send in the troops at the favorable moment, and after the failure determined to land farther down and turn the batteries.

Stated intentions from a summary and a history; no inspected orders.

supportedpost_outcome The frozen and live results read Confederate victory. NPS calls it a hollow victory. Greene says the guns were silenced by 1 p.m. but the batteries remained as capable of resisting assault, their guns resuming fire later; Bowen reports the gunboats retired after six hours and a half.

Retain the original result and engagement interval; later movements and campaign contribution are different measures. No new probabilities or individual causal credit. NPS's 'hollow victory' is campaign context.

disputedpost_outcome The frozen casualty text reads Total unknown (US 80; CS unknown); the live field reads 80 total (US 80; CS 0;). Greene gives the Confederate troops 3 killed and 15 wounded and Porter 19 killed and 56 wounded; Bowen reported 3 killed and 12 or 15 wounded (OCR '12 oT 15').

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. Porter's 19 and 56 sum to 75 (a computation here), not the frozen 80; the live Confederate zero is not measured absence.

supportedunresolved The frozen and live commanders are Porter, a Rear Admiral, and Bowen, a Brigadier General; Greene places Grant on the river directing the landing force. Bowen reports Colonel Wade, of the artillery, killed at his post.

Joint army-navy operation; neither frozen commander receives automatic sole credit.

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 Mississippi Squadron with seven companies of the 58th Ohio, and Bowen's Division, without counts; the live field reads zero. NPS says Porter led seven ironclads; Greene lists his squadron at 81 guns against batteries containing only thirteen guns, and gives Bowen's force, including Green's brigade, as about 4,700 men on April 28. Bowen reported six gunboats averaging ten guns.

Naval armament, battery armament and a pre-engagement garrison figure differ in scope and source; none is adopted as matched opening strength. Live zeros are not measured absence.

supportedinherited Greene says bluffs of something over a hundred feet rose behind Grand Gulf, fortified by earthworks forming two sets of batteries above and below the landing, on which work had gone on for the seven weeks since the troops occupied the point. NPS says the upper batteries at Fort Cobun stayed out of reach.

Inherited relative to the April 29 start; the batteries were prepared beforehand and may be commander-created under a campaign boundary. No map verification or numerical effect.