Statistics for occurrence #1 of “Merritt” in chapter 1, page 23 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 4: The Cavalry:
...hed to the Reserve Brigade under General Wesley Merritt.
The troopers took part in the first battle of Bull Run, were at the siege of Yorktown, fought at Gaines' Mill and Beverly Ford, served under Merritt on the right at Gettysburg, and did their duty at Yellow Tavern, Trevilian Station, and in the Shenandoah Valley under Sheridan; and they were present at Appomattox.
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