Statistics for occurrence #1 of “Gaines' Mill” in chapter 10 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:

...t of the artillery, as did, on a larger scale, the Austrian cavalry on the evening of Sadowa. General Wesley Merritt, U. S. A., one of the ablest cavalry officers of his time, who was present at Gaines' Mill as an aide-de-Camp to General Cooke, thus described this affair: During the early part of this battle the Union army held its ground and gained from time to time some material success. But it...
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