 From March 24 to June 25, it was at Wolf Run Shoals, Union Mills, and on the Occoquan.On June 25, the brigade was assigned as the 3rd Brigade, 3rd Division, I Corps, and ordered to form the rear guard of the Army of the Potomac as it marched north after Robert E. Lee's Army of Northern Virginia.The 14th marched with the brigade from Wolf Run Shoals on June 25, crossed the Potomac river on June 27, at Edward's Ferry, and moved north through Frederick City and Creagerstown, Maryland.