Statistics for occurrence #1 of “Beaver Creek, in Maryland” in chapter 3.12 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War. Volume 4.:

...in T. McMAHON, Brevet Major.-General, U. S. V. The chief events of this chapter in the history of the Army of the Potomac were the pursuit of Lee to Virginia, the affair of the Vermont brigade at Beaver Creek, in Maryland , the cavalry engagements at Hagerstown and Williamsport, the action at Bristoe Station, the taking of the Rappahannock redoubts, the movement to Mine Run, and the Kilpatrick-Dahlgren raid to Richmond...
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