...nment understood this duty, and on the 23d of September the order was given to Meade to send the Eleventh and Twelfth corps to the city of Washington. As we said in the preceding volume, Howard and Slocum , who were in command of these corps, left on the following morning the banks of the Rapidan, and conducted their troops to the capital, where they were joined by General Hooker, their new chief. Nu...