In line with what
@Taylin said, here is a bit of the 41st's regimental history from the Illinois Adjutant General's Report:
December 16th, returned to Vicksburg, and went into camp on Big Black River. There nearly
200 of the Regiment re-enlisted as veterans March 17th, 1864, when they were given thirty days
furlough.
The non-veterans moved up Red River, participating in the campaign under General A. J. Smith
and General Banks, taking part in all the battles and skirmishes of that disastrous campaign.
When the veterans arrived at Camp Yates, a dispatch was received that a riot was in progress at
Charleston, Illinois, in which Major York and several of the Fifty-fourth Infantry had been shot
by the rebel sympathizers. Colonel Pugh hurried forward with his Regiment to Mattoon, arriving
at night. He found the whole city aroused, and many of the citizens under arms. From Mattoon
the Regiment was sent to Windsor, then miles south, where a camp of 1,500 rebel sympathizers
was reported, but on arriving there no one was found under arms, and the Regiment returned to
Mattoon, where it dispersed on its furlough of thirty days, at the expiration of which it moved to
Cairo; thence to Nashville. From Nashville it was sent to Tunnel Hill, where the rebels had torn
up the railroad, to guard the line of communication with Atlanta. Thence it moved to Moon
Station, Big Shanty, Marietta and Kenesaw Mountain. While camped at Marietta, July 21st, the
term of service of the men who did not re-enlist expired, and they returned home, under
command of Colonel Pugh.
The Illinois Adjutant General's Report in full for the years 1861 to 1866 is available here: