Jubal Early's washington raid?

From what I'm finding, sounds like he got in sight of Washington DC but was then defeated. Here is a brief quote from Encyclopedia Britannica:

"The climax of his [Jubal Early's] career came in the summer of 1864 when Gen. Robert E. Lee placed him in command of all Southern forces in the strategic Shenandoah Valley. His first action was to drive the Union forces under Gen. David Hunter out of the state and to move down the valley unopposed. He then crossed the Potomac River, reaching Hagerstown and Frederick in Maryland, and defeated a small Union force at the Battle of Monocacy (July 9, 1864). Two days later he led 8,000 troops past Silver Spring and brought them into sight of Washington before withdrawing.

Northern pride was wounded by Early's threat, and Gen. Ulysses S. Grant dispatched Gen. Philip Sheridan to clear the valley once and for all. Bowing to numerically superior forces, Early suffered three decisive defeats at Sheridan's hands between September 19 and October 19—at Winchester, Fishers Hill, and Toms Brook—after which the valley was laid waste. Early then carried out a well-planned attack at Cedar Creek but was forced to retreat up the valley to Waynesboro, where he experienced the final defeat (March 2, 1865) that ended Confederate resistance in that area and opened the way to Union capture of Richmond." http://www.search.eb.com/eb/article-9031716

There is more information on the Battle of Monocacy. Could this be the raid you were referring to? Again, Britannica has good information. Just log on through a library or school and you can access the full-text pages.