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.