Statistics for occurrence #1 of “Colonel Walter Scott O'Kane” in part 8.19, chapter 8.26 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War: The Opening Battles. Volume 1.:

...derstood how to fight artillery in the brush, took all the canister he could lay his hands on, and with two guns went up in the charge with the infantry. General Rains's brigade on the left, led by Colonel Walter Scott O'Kane , and Major Rainwater made a brilliant dash at the redoubt and battery which had been throwing on them for an hour or more from its position in an old field. Eight guns were captured along the line....
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