Late in the spring of 1863 tensions grew between Union commander Joseph Hooker and his cavalry commander Brig. Gen. Alfred Pleasonton because of the latter's inability to penetrate Maj. Gen. J.E.B. Stuart's cavalry screen and gain access to the Shenandoah Valley to locate the Army of Northern Virginia, which had been on the move since the Battle of Chancellorsville in early May. On June 17, Pleasonton decided to push through Stuart's screen. To accomplish his goal he ordered Brig. Gen. David McM. Gregg's division from Manassas Junction westward down the Little River Turnpike to Aldie. Aldie was tactically important in that near the village the Little River Turnpike intersected both the Ashby's Gap Turnpike and Snicker's Gap Turnpike, which respectively led through Ashby's Gap and Snickers Gap of the Blue Ridge Mountain into the valley.