Statistics for occurrence #1 of “Colonel Dahlgren” in chapter 40 of Admiral David D. Porter, The Naval History of the Civil War.:

...to arrange a joint military and naval expedition, to operate, first, up the Pamunky River against the Confederate forces near King and Queen Court House, which had attacked the party under command of Colonel Dahlgren , and killed that officer; and, second, against a force of the enemy reported as about to make an expedition from the peninsula. Owing, however, to constant fogs, the gun-boats could not co-operate ...
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