Questions about Chattanooga campaign

Short answers, pulled from the story.

What happened to the Union Army of the Cumberland in September 1863 during the Chattanooga campaign?

The Union Army of the Cumberland under Maj. Gen. William S. Rosecrans suffered a crushing defeat at the Battle of Chickamauga and was bottled up inside Chattanooga, Tennessee by Confederate forces.

Who took command of Union forces in the West after the Battle of Chickamauga on October 1 1863?

Secretary of War Edwin M. Stanton ordered Maj. Gen. Ulysses S. Grant to take command of Union forces in the West just hours after Chickamauga.

How did the Union open a reliable supply line through Brown's Ferry during the Chattanooga campaign?

Brigadier General William F. Baldy Smith devised a plan involving crossing the Tennessee River from Moccasin Point to seize ground above Brown's Ferry early on the morning of October 27.

When did Union soldiers advance to seize Orchard Knob during the Chattanooga campaign?

Union soldiers advanced from fortifications around Chattanooga to seize Orchard Knob on November 23 and overwhelmed 600 Confederate defenders who fired only a single volley before being overrun.

What were the total casualties for both sides during the Chattanooga campaign including killed wounded and missing?

Union casualties amounted to 5,824 out of about 56,000 engaged while Bragg reported Confederate casualties of 6,667 out of about 44,000.