The Battle of Cool Spring, also known as Snicker's Gap, Island Ford, Parker's Ford, and Snicker's Ferry, was a battle in the American Civil War fought in Clarke County, Virginia, between July 17 and July 18, 1864, as part of the Valley Campaigns of 1864. The battle resulted in a Confederate victory.
After the Battle of Fort Stevens on July 11, a Union column, consisting of the VI Corps and elements of the XIX Corps under Maj. Gen. Horatio G. Wright, pursued Lt. Gen. Jubal Early's army as it withdrew from the environs of Washington, D.C., through Loudoun County, Virginia. On July 15 Wright's force was joined by elements of Brig. Gen. George Crook's command, which had accompanied Maj. Gen. David Hunter during his retreat through West Virginia following the Battle of Lynchburg on June 18.
After two brief engagements in Loudoun County at Heaton's Crossroads (present day Purcellville) and Woodgrove on July 16, Early's main force crossed the Blue Ridge Mountains at Snickers Gap and established themselves in the environs of Berryville. To cover his rear, Early left substantial rearguard forces at main river crossings of the Shenandoah River. On July 17, the Union cavalry passed through Snickers Gap and unsuccessfully attempted to force passage of the Shenandoah River at Snickers Ford (Castleman's Ferry).
On July 18, Gens. Crook and Wright arrived at Snickers Gap and determined to attack what they mistakenly thought was a light picket line of Confederates along the river, left to cover Early's retreat up the Valley. Instead of allowing his cavalry to cross the river and reconnoiter the Confederate positions to confirm this assumption, it was dispatched to Ashby's Gap to attack Early's supply train which was traveling to the south of Early's main army. Wright then developed a plan where a small Federal force would cross the river upstream from the main crossing at Castleman's Ferry and flank the Confederate position there. Gen. Crook assigned Col. Joseph Thoburn to this task.
At 3 p.m. that afternoon, Thoburn crossed the Shenandoah at Judge Richard Parker's Ford, quickly driving off a small force of Confederate pickets. The pickets quickly alerted their commander, Maj. Gens. John B. Gordon and John C. Breckenridge, of the Federal advance. Gordon responded by moving a division to the vicinity of the ford, using a small ridge that lay between him and the Federals to screen his movements. Breckenridge ordered Brig. Gen. Gabriel C. Wharton and Maj. Gen. Robert E. Rodes to the ford; they deployed along Gordon's left flank, with Wharton forming the center. Wharton's sharpshooters quickly drove back Thoburn's skirmishers who occupied a valley between the ridge on which the Confederates were lined and the high ground along the riverbank where the first of two federal lines was formed in front of a stone fence. A reserve line was located on the low sunken bank of the river behind the stone fence, well protected and concealed from the Confederates.
Around 6 p.m., Rodes attacked the main Federal position on the high ground along its right flank. The Federal line turned to meet the attack and exposed its left flank to enfilading fire from Gordon and Wharton. Given the exposed position and the inexperience of many of the men in the Federal ranks (many were so-called "100-days men" who enlisted to man the fortifications around Washington and had not seen battle before), the line quickly collapsed and Federals began streaming across the Shenandoah, jumping over the reserve line in the process. About the time of the Federal retreat, Brig. Gen. James B. Ricketts arrived on the eastern bank of the river. Originally intended to reinforce Thoburn, Gen. Wright demurred with Thoburn's line in full retreat. As Rodes's men pressed the attack they came to the stone wall, whereupon the Federal reserve line opened up on the unsuspecting Confederates, driving them back towards the ridge. Throughout the remainder of the evening, Rodes sent small brigade-level attacks at the Federal position on the river bank but was unsuccessful in driving them across the river, because Thoburn was able to reinforce his right due to the lack of pressure on his left by Gordon and Wharton. After sunset, Thoburn retired the rest of his force across the river.