Only a handful of Federals remained outside those lines as a rear guard. Minty's Cavalry covered Rossville Gap, infantry detachments [Dick's Brigade] watched Missionary Ridge to the north, and Brig. Gen. James G. Spears' Federal East Tennessee brigade defended the northern end of Lookout Mountain. Other Union troops [under Whitaker] crossed over to the northern bank of the Tennessee River to protect against Rebels crossing either upstream or downstream. [Powell and Friedrichs, page 254]
These remaining outposts were challenged by the full force of Longstreet and Polk and all except Whittaker on the northern bank were forced to withdraw behind the perimeter of Chattanooga's defensive lines. With the Yankees so compressed and fortified, a new plan would be needed if Bragg was to destroy Rosecrans once and for all.
Colonel Stout's report of September 24, 1863 provides the only record of the actions of the Seventeenth during these two critical days.
On The 21st,..
The cost of the campaign was frightful. Officially, Rosecrans reported 16,179 killed, wounded and missing. Bragg reported 17,804, but 18,500 is probably a more accurate estimate for the Rebel army. [Powell and Friedrichs, page 256]
Of the 487 men of the Seventeenth Kentucky that officially were engaged at Chickamauga, six men were killed, 105 wounded and 15 reported missing for a total of 126 casualties by the time this battle was over. The totals for their brigade were 1,384 engaged, 16 killed, 254 wounded and 61 missing for a total of 331 casualties. [Powell and Friedrichs, page 272]