Statistics for occurrence #1 of “Maj.-Gen. Joseph Hooker” in chapter 8, page 93 of Brig.-Gen. Bradley T. Johnson, Confederate Military History, a library of Confederate States Military History: Volume 2.1, Maryland:

...amped at Williamsport, where during the summer it was reinforced by new recruits. Maj.-Gen. N. P. Banks was assigned to command this army and picketed the Potomac from Georgetown to Harper's Ferry. Maj.-Gen. Joseph Hooker with a division was posted in southern Maryland, and picketed the Potomac from Washington to its mouth. Forty thousand men were thus occupied in guarding Maryland along the line of the Potomac alon...
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