Editing Battle of the Wilderness (section)

===Cavalry===
[[File:Battle of the Wilderness Cavalry May 6.png|thumb|Hancock was kept blind on his left, and the Union Army's route to Spotsylvania Court House was blocked]]

Custer's First Brigade reached Brock Road at about daylight on May 6.<ref name="Gallagher126" /> Custer extended his right toward Hancock and his left toward Gregg's 2nd Division at Todd's Tavern. Torbert's Second Brigade, commanded by Colonel [[Thomas Devin]], began the trip from Chancellorsville to join Custer's right, bringing a battery. Hancock's infantry was hard pressed by two divisions from Longstreet's corps, but he worried about the location of Longstreet's other two divisions.<ref name="Gallagher126" /> Although Hancock wanted Custer to move down Brock Road to look for Longstreet's other divisions, Custer was attacked after 8:00{{nbsp}}am by Rosser's brigade. The arrival of Devin with his six-gun battery plus two more guns from Gregg turned the fight into Custer's favor, and Rosser backed off.<ref name="Gallagher127">{{harvnb|Rhea|1997|p=127}}</ref>

Hancock still did not know what was behind the Confederate cavalry, and he kept a substantial portion of his corps outside of the fighting with Longstreet in order to protect his left.<ref name="Gallagher127-128">{{harvnb|Rhea|1997|pp=127–128}}</ref>{{#tag:ref|Union leadership was concerned about additional divisions, other than the two on the Orange Plank Road, from Longstreet's First Corps. Pickett's Division, which leadership believed was with Longstreet, was detached for garrison duty near Richmond.<ref name="Esposito125"/>|group=Note}} While Custer was fighting, Gregg was fighting Wickham's brigade on the Brock Road near Todd's Tavern. This effectively blocked the Union Army from Spotsylvania Court House. Concern after Hancock's left had been turned by Longstreet's surprise attack from the unfinished railroad caused the Union leadership to order the cavalry to withdraw. At 2:30{{nbsp}}pm Gregg was ordered to withdraw to Piney Branch Church, and Custer and Devin were sent further east back to Catharine Furnace.<ref name="Gallagher129">{{harvnb|Rhea|1997|p=129}}</ref>