July 27, 1864 Wednesday
Having decided to lay at least partial siege to Atlanta, Sherman sent out several cavalry expeditions to cut the railroads south of Atlanta and otherwise harass the Confederates. McCook raided the Atlanta and West Point and Macon and Western railroads until the end of the month and engaged in several skirmishes. Garrard was raiding to the South River, also with skirmishing. Stoneman raided toward Macon, again with considerable fighting, and not much success. Maj Gen Oliver Otis Howard (
http://en.wikipedia.org/wiki/Oliver_O._Howard ) assumed command of the Federal Army of the Tennessee, succeeding Maj Gen John A. Logan, who had earlier succeeded the slain McPherson. Major General David S. Stanley (
http://en.wikipedia.org/wiki/David_S._Stanley ), USA, assumes command of the Federal 4th Army Corps, left vacant by Major General Oliver Otis Howard's promotion. Maj Gen Hooker (
http://en.wikipedia.org/wiki/Joseph_Hooker ), as a result of Howard’s promotion, resigned his command of the Twentieth Corps, feeling he ranked Howard. Brigadier General Alpheus S. Williams (
http://en.wikipedia.org/wiki/Alpheus_Starkey_Williams ), USA, assumes temporary command of the Federal 20th Army Corps, after the resignation of Major General Joseph Hooker. Many supporters of Logan, both a politician and a general, felt Sherman had been unfair. Thomas reportedly had opposed Logan as a permanent commander.
Early carried out various rail-wrecking operations in the northern Shenandoah Valley and prepared once more to cross the Potomac River. There was a skirmish at Back Creek Bridge, West Virginia. Maj Gen Halleck took command of the departments around Washington concerned with the defense of the area.
The Second Corps of Gen Hancock and two cavalry divisions under Sheridan moved across the James River from Grant’s army preparatory to brief diversionary operations toward Richmond from north of the river. Advancing by the New Market and other roads, the Federals fought several brief skirmishes. The main fighting, until the twenty-ninth, was at Deep Bottom, also known as Darbytown, Strawberry Plains, and New Market Road. The Federals, not intending to assault but mainly to bring pressure on Lee, faced heavy opposition.
Elsewhere, action occurred at Whiteside on Black Creek in Florida and at Massard Prairie near Fort Smith, Arkansas. Severe bombardment continued against Fort Sumter in Charleston Harbor. A skirmish flared at Snapfinger Creek, Georgia and a Federal expedition operated from Norfolk, Virginia into North Carolina. Skirmishing also broke out on the Blackwater Creek and on Big Creek, and Federals scouted in Charlton County, Missouri. Boat crew commanded by Lieutenant J. C. Watson made daylight reconnaissances of the Mobile Bay channel. Watson and his men, towed into the bay by the small tug Cowslip, sounded the outer channel and marked the outside limits of the Confederate torpedo fields with buoys for the coming attack on the defenses of the bay.