Statistics for occurrence #1 of “Washington, D. C.” in chapter 21, regiment reg241 of Frederick H. Dyer, Compendium of the War of the Rebellion: Regimental Histories:

...ndale June 30. Malvern Hill July 1 and August 5. At Harrison's Landing till August 16. Moved to Alexandria August 16-28, thence march to Centreville August 30. Cover Pope's retreat to Washington, D. C. , September 1-2. Near Chantilly and Flint Hill September 1. Vienna September 2. Maryland Campaign September 6-22. Battles of South Mountain September 14. Antietam September 16-17. ...
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