Statistics for occurrence #1 of “General Pleasonton” in chapter 4.38 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War. Volume 3.:

...he theater of war was not considered favorable for cavalry, and it was distributed to the various headquarters for escort duty, guards, and orderlies. It was not until 1863 that it was united under General Pleasonton in a corps consisting of three weak divisions, Buford's, D. McM. Gregg's, and Duffie's, afterward consolidated into two, Stahel's cavalry, which joined at Frederick, June 28th, becoming the third div...
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