Statistics for occurrence #1 of “General Mansfield” in chapter 7, page 369 of William Schouler, A history of Massachusetts in the Civil War: Volume 1:

...d entered Maryland. McClellan's army was brought up from the Peninsula, and advanced to meet him. On the fourteenth day of September, Hooker's corps took Maryland Heights by storm; General Reno and General Mansfield killed, Hooker wounded. On the 17th, the battle of Antietam was fought. Lee retreated, with what remained of his army, across the Potomac. He was not pursued, as many thought he should have bee...
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