Statistics for occurrence #1 of “Northern Virginia” in chapter 7.43 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War: Volume 2.:

...ces, posted at Old Church, when on the 26th of May, preparatory to an immediate advance upon Richmond, General McClellan directed — me to complete the duty above specified, so that the enemy in Northern Virginia , then occupying the attention of McDowell, Banks, and Fremont, could not be suddenly thrown upon our flank and rear nor otherwise strengthen the enemy in Richmond. I was allowed to adopt my own pla...
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