that might be a successful alternative. He designated Hancock's II Corps to head southeast from Spotsylvania to Milford Station, hoping that Lee would take the bait and attack this isolated corps. If he did, Grant would attack him with his three remaining corps; if he did not, Grant would have lost nothing and his advance element might reach the North Anna before Lee could. Hancock's corps of 20,000 men started marching the night of May 20–21. He was surprised to encounter some of Pickett's men at Milford Station on May 21, from which he inferred correctly that Lee was being reinforced. Rather than risk his corps in a fight in an isolated location, he decided to terminate his maneuver. Lee was still in the dark about Grant's intentions and was reluctant to disengage prematurely from the Spotsylvania Court House line. He cautiously extended Ewell's Corps to the Telegraph Road and notified Breckinridge, who was en route to join Lee, to stop at Hanover Junction and defend the North Anna River line until Lee could join him. Meanwhile, Grant started the rest of his corps on their marches. Lee ordered Ewell to march south on the Telegraph Road, followed by Anderson's Corps, and A.P. Hill's Corps on parallel roads to the west. Lee's orders were not urgent; he knew that Ewell had to march over relatively good roads, versus Hancock's over inferior roads. On the morning of May 23, Warren and Hancock approached the North Anna. There were no significant fortifications to their front. Lee had misjudged Grant's plan, assuming any advance against the North Anna would be a mere diversion, while the main body of Grant's army continued its flanking march to the east. At the Chesterfield Bridge crossing the Telegraph Road, a small South Carolina brigade under Col. John W. Henagan had created a dirt redoubt, and there was a small party guarding the railroad bridge downstream, but all the other river crossings were left undefended. Grant had been presented with a golden opportunity if he moved quickly enough to take advantage of it. Hancock's men, led by the division of Maj. Gen. David B. Birney, overwhelmed Henagan's small force, which fled across the bridge. Union sharpshooters discouraged Confederate attempts to burn the bridge. Hancock's men did not cross the bridge and seize ground to the south because Confederate artillery was laying down heavy fire against them. At Jericho