12th Illinois Volunteer Infantry Regiment ( 3 Year ) The 12th Regiment Illinois Volunteer Infantry , known as the " 1st Scotch Regiment , " was an infantry regiment that served in the Union Army during the American Civil War . Service . The 12th Illinois Infantry was mustered into Federal service for a three - year enlistment on August 1 , 1861 at Cairo , Illinois . The regiment was mustered out on July 18 , 1865 at Camp Butler National Cemetery Camp Butler , Illinois The Twelfth Infantry Illinois Volunteers was mustered into the United States service for three years August 1 , 1861 . The regiment remained at Cairo , where it was organized until September 5 , 1861 , when , with the Ninth Illinois Infantry , it moved up to and occupied Paducah , being the first Union troops there . With the exception of occasional expeditions , the Twelfth lay at Paducah until February 5 , 1862 . Four companies , however , occupied Smithland , Kentucky , until January 25 , 1862 - Lieutenant Colonel Chetlain commanding Post . Were engaged in the demonstration against Columbus , Kentucky , forty - six miles from Paducah , during the Belmont battle . In January were engaged in a reconnaissance in force towards Fort Donelson , Tennessee . February 5 , Embarked for Fort Henry ; moved up left bank and occupied Fort Heiman . Remained at Fort Heiman until February 12 , when proceeded to Fort Donelson . Endured the cold and snow and hunger and fatigue of the Fort Donelson battle ; formed with the Ninth and Forty - first Illinois , McArthur ' s Brigade , which suffered so terribly , but fought so nobly on February 15 . Loss , 19 killed , 58 wounded , and 10 missing . February 22 , moved to Clarksville , Tennessee , and occupied Fort Sevier . February 26 , moved to Nashville . Returned to Clarksville , March 1 . Mar 6 embarked for Pittsburg Landing . Went into camp 19th . Took part in the terrible battle of Shiloh , being engaged nearly all the time of the two days . Colonel Chetlain commanded the regiment the 6th , but he being injured by a fall from his horse , Major Hugunin commanded on the 7th . Regimental loss , 109 killed and wounded , and seven missing . April 28 , moved with the army on Corinth ; was engaged in the siege of Corinth , doing its share of picket and fatigue duty , extending saps , etc . After the evacuation the regiment was sent with General Pope in pursuit of the enemy . Lay at Booneville six days and then returned to Corinth . The regiment remained at Corinth until the middle of September . During the approach on Corinth were in Second Brigade , Second Division Army of Tennessee . Brigadier General Thomas A . Davies , commanding division ; Brigadier General R . J . Oglesby , brigade , and Colonel Chetlain , regiment . On September 16 moved to near Iuka . Were not engaged in the battle of Iuka . On the 19th moved to Burnsville , where it remained till October 2 . October 3 and 4 , were engaged in battle of Corinth . The division ( second ) Gen . Davies , and the sixth division , General McArthur , fought nearly the whole rebel army . The losses were very heavy , and the fighting most desperate . On the 4th , " Powell ' s Battery , " which we were supporting , was captured by the enemy in a charge , but was almost immediately retaken . In this affair the Twelfth took a very conspicuous and brilliant part . Supported by a small part of the Fiftieth and Fifty - second Illinois Infantry , they drove the enemy from the works , capturing a stand of colors , and turned the guns of the battery on the enemy . The division lost more than half of the men that were lost during the day , the regiment losing 17 killed , 80 wounded , and 15 missing . Captain Guy C . Ward , acting major , was killed , and brigade commander General Oglesby severely wounded . Remained at Corinth until January 24 , 1863 when it was sent as train guard to Hamburg and returned . April 12 . The enemy attacked Glendale , an out - post twelve miles from Corinth . The regiment , 225 strong , in command of Major Hugunin , was ordered as reinforcement . On arriving , they found that the Sixty - fourth Illinois , " Yates ' Sharp Shooters , " had repulsed the attack , and they returned to Corinth . The regiment was now in left wing Sixteenth Army Corps , Major General R . J . Oglesby commanding . June 6 , 1863 , moved to Pocahontas , Tennessee , to guard railroad , where they remained until October 29 , when left wing being attached to Fifteenth Corps , Major General W . T . Sherman commanding , they moved as rear guard , via Corinth , Iuka , crossing Tennessee river at Eastport - at Lauderdale , Alabama , destroying an immense cotton factory - to Pulaski , Tennessee , arriving November 12 . Here left wing remained , Fifteenth Army Corps going on to Chattanooga and battle of Missionary Ridge . November 13 , went as wagon guard with Second Iowa Infantry to neat Columbia , Tennessee , and returned . November 25 . Ordered to Richland Station , Nashville and Decatur Railroad , to guard railroad , where they remained about two months , doing duty , foraging , etc . December 29 . Colonel Chetlain appointed Brigadier General . January 16 , 1864 . Regiment re - enlisted as veterans . January 18 . 311 men and 24 officers started for Camp Butler , Illinois , on veteran furlough . The remainder , about 90 men , remained under command of Captain J . D . Towner . March 18 . Having re - organized at Camp Fry , Chicago , Illinois , the Twelfth proceeded to Pulaski , Tennessee . April 28 . Marched to Larkinsville , and thence by rail to Chattanooga . Started on the Atlanta campaign 9 May , and from that time till the fall of Atlanta , was actively engaged . Was in second brigade second division left wing Sixteenth Army Corps , Colonel Aug . Mersey commanding brigade ; Brigadier General T . W . Sweeney commanding division ; Brigadier General G . M . Dodge commanding left wing ; Major General J . B . McPherson commanding department and Army of Tennessee . The first engagement the regiment participated in was Lay ' s Ferry and Rome Cross Roads , 13th , 14 and 15 May , losing two killed and 21 wounded . May 27 . Assisted in repulsing a heavy night attack on Dallas . June 2 . Left the lines and swung around toward Lost Mountain and Ackworth . June 10 . Passed through Ackworth and Big Shanty . June 27 . Slightly engaged at Kenesaw , losing three men wounded . July 4 . Engaged near Nickajack creek . Crossed Chattahoochie river and was engaged in battle of July 22 , Bald Knob and Decatur ; losing 35 or 40 men killed and wounded . July 28 . Engaged at Ezra Church . During August closely engaged in the siege of Atlanta ; losing some 40 men killed and wounded . August 27 . Moved out from works in the movement around Atlanta , compelling its fall . September 1 . Assisted in repulsing attack of the enemy on right of Fifteenth and left of Sixteenth Army Corps . Marched to Lovejoy ' s , and , September 6 , returned to East Point , where division was transferred and became fourth division Fifteenth Army Corps . Sep 26 moved to Rome , Georgia . October 4 , by rail to Allatoona . October 5 . Engaged in battle of Allatoona , losing 57 killed and wounded out of 161 muskets taken into action . Returning to Rome , remained until November 11 . On November 11 started on the " march to the sea , " passing through Kingston , Cartersville , Cassville , Allatoona , Ackworth , Big Shanty and Marietta , arriving at Atlanta November 15 . 16th , resuming march , passed through Jonesboro , McDonough , Jackson , crossed Ocmulgee river at Seven Islands Cotton Factory , Monticello , Hillsboro , Clinton , camping near Gordon on 24th . Lost one man near Clinton , captured by Wheeler ' s cavalry . November 25 . Passed through Irwinton , crossed Oconee river , where some opposition was made by the enemy , on through Irwin ' s Cross Roads , Wrightsville and head waters of Ohoopee river , through Summerville , camping on Scull ' s creek , four miles from Millen 2d December . December 3 . Crossed Ogeechee river , on picket ; 4th returned , marched down the river and crossed at Jenckes ' Bridge on the 8th . Marched to Ogeechee canal finding the enemy in force , on the 9th , four miles from the canal . They were soon flanked out of their position , leaving a " Blakesley gun " English manufacture , in our possession . 10th . With Sixty - sixth Illinois , were sent to burn railroad bridge over Little Ogeechee , but it was burned by the enemy on our approach . Until 17th the regiment was stationed in different places on the line around Savannah , when it was detailed to guard the prisoners taken at Fort McAllister and on the march and to take them to Hilton Head . January 10 , 1865 . Returned to Savannah and remained to 28th , when broke camp , and marching up the Savannah river , camped at Sister ' s Ferry , 31st . February 4 . Crossed on 4th , and after repairing bridge and causeway crossed Coosawatchie , on the 7th ; Whippy Swamp , 8th ; Salkahatchie , 9th ; Beaufort river bridge , 10th ; South Edisto , 11th ; Charleston and Augusta railroad , 12th ; North Edisto , 13th ; Sandy Run Post Office , 14th ; 16th , Saluda river , 17th , Broad river , and entered Columbia , making a march from Savannah of 177 miles . February 18 and 19 , tore up railroad , ( Charleston and Columbia ) ; 20th , marched to Muddy Springs ; 21st , Longtown : 22d , Peay ' s ferry ; 23d , crossed Waterec River ; 24th , with four companies of 66th Illinois , on reconnaissance through Camden ; 25th , on picket ; 26th , 27th and 28th , at Lynch ' s Creek ; March 1 , crossed Black Creek ; 3d , Julian creek ; 4th , at Cheraw , making 164 miles from Columbia . March 6 , crossed Peedee river , passed Gum Swamp , Springfield , Laurel Hill , North Carolina , Lumber creek , Rocky Fish creek , arriving at Fayetteville , North Carolina , March 12 , from Cheraw , 73 miles . March 14 . Crossed Cape Fear river , and on the 19th arrived near Neuse river ; 18th from Goldsboro , from Fayetteville , 77 miles . March 20 , 1865 . Marched 9 miles and went into position in front of the enemy . 21st , lost two men wounded ; 22d , moved into enemy ' s works . March 24 . Entered Goldsboro , North Carolina . Total distance marched since leaving Savannah , over 600 miles . April 10 . Broke camp and marched in pursuit of Johnson ' s army ; Raleigh , 14th ; Morrisville , 15th , where it remained until Johnson ' s surrender . April 21 . Returned to Raleigh ; 29th , started northward . Petersburg , May 6 , making 186 miles in six and a half days . May 9 , Manchester . Alexandria , 19th . Passed in the grand review at Washington , May 24 . June 3 , left Washington ; June 6 , arrived at Louisville , Kentucky . July 10 , 1865 . Mustered out , at Louisville , Kentucky . July 18 , received final pay and discharge at Camp Butler , Illinois . http : / / www . illinoiscivilwar . org / cw12 - agr . html Total strength and casualties . The regiment suffered 5 officers and 143 enlisted men killed in action or mortally wounded and 3 officers and 109 enlisted men who died of disease , for a total of 260 fatalities .