Statistics for occurrence #1 of “Major-General J. F. K. Mansfield” in chapter 7, page 214 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 10: The Armies and the Leaders.:

...f the Shenandoah, and in earlier organizations of the Army of the Potomac. It was the smallest corps in the army, and in the early days contained about twelve thousand men. The command was given to Major-General J. F. K. Mansfield , who was killed at Antietam, the first battle of the new corps. Its next battle was that of Chancellorsville where, with the Third, it bore the real brunt of the fight. After Gettysburg, in which...
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