Advance of the cavalry.-Concentrating the Fifth, the Eleventh,
the Twelfth Corps, and Pleasonton's Cavalry at Chancellors-
ville.-Hooker assumes command at Chancellorsville.-
Issues orders to advance to Tabernacle Church.-When the
troops were in sight of the position, ordered back.-Protest
of corps commanders against withdrawal.-A good position
abandoned for a bad one.-Awaits an attack.-Enemy march
across his front for three hours.-Overwhelm his right wing.
-One-half of his army fighting.-Other half awaiting orders