Statistics for occurrence #1 of “Harper's Ferry, W. Va.” in chapter 8 of Frederick H. Dyer, Compendium of the War of the Rebellion: Regimental Histories:

...22nd Army Corps, Dept. of Washington, to February, 1865. Duty in the Defenses of Wasnington, D. C., till December, 1861. Guard R. R. near Bladensburg, Md., till May, 1862. Ordered to Harper's Ferry, W. Va. Defence of Harper's Ferry, W. Va., May 24-30. Operations in the Shenandoah Valley, Va., till August. Battle of Cedar Mountain August 9. Pope's Campaign in Northern Virginia August 16-...
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