The monument to the Twelfth Illinois Cavalry is west of Gettysburg on Reynolds Avenue between the Railroad Cut and Chambersburg Road. (39.837082° N, 77.248556° W; map; Tour map: North Reynolds Avenue) The monument was dedicated in 1891 by the State of Illinois.
The regiment had parts of five companies at Gettysburg and was combined with the 3rd Indiana Cavalry under the command of Colonel George H. Chapman. The combined regiments totaled 588 men and lost 4 killed, 10 wounded and 6 missing.
From the front of the monument:
First line of battle July 1, 1863. Held until relieved by 1st Corps
One Squadron picketing ridge east of Marsh creek met enemy’s left advance
Thos. G. Blanset
Gabriel B. Durham
Homer C. Stedman
From the rear:
Regiment retired to ridge on left rear, with Brigade fought dismounted, repulsing attacks of the enemy. Covered the withdrawal of line to Cemetery Hill and in the evening took position on left flank of the Army
July 2, 1863 Buford’s Division retired toward Westminster
See more on the 12th Illinois Cavalry in the Civil War