America's Civil War Source
A resource for those interested in the study of America's Civil War
Friday
July 26, 1861
George McClellan Appointed to Army of Potomac

George McClellan appointed commander, Army of the Potomac,
replacing Irvin McDowell. Some sources give the date as July 27,
the day he received the orders. He had been called to the post
after Bull Run and takes command of all troops around
Washington, DC.