12th Illinois

On back of monument:
12th Infantry,
Commanded by
1. Lieut. Col. A. L. Chetlain.
2. Capt. J. R. Hugunin.
Held this line and one in the ravine about 75 yards to the front from 10.30 a.m. until 2.00 p.m., April 6, 1862, when the regiment was forced to take a new position about 400 yards to the rear. It lost in the battle, 2 officers and 20 men killed; 5 officers and 71 men wounded; 1 officer and 3 men missing; total, 102.

9th Illinois

The 9th Illinois is the only regiment with two monuments, one in the national cemetery and one on the battlefield.

On back of monument in the national cemetery:
April 6, 1862
Present for duty 578
Killed and died of wounds 103
Wounded 263
Total killed and wounded 366

On back of monument:
9th Infantry,
Commanded by Col. August Mersy.
Went into action about 10.30 a.m., April 6, 1862, in the ravine in front, holding that line until 2.00 p.m. After great loss they fell back about 500 yards when the regiment re-formed and went to their camp. Their loss in the battle was 1 officer and 60 men killed; 19 officers and 281 men wounded; 1 officer and 4 men missing; total, 366.

14th Missouri - 66th Illinois

On back of monument:
14th Missouri,
Afterwards designated 66th Illinois Infantry,
Commanded by Col. B. S. Compton.
This regiment, known as Birge's Sharpshooters, armed with Deer rifles, was detached from its brigade at 9.30 a.m., April 6, 1862, and ordered to guard Snake Creek bridge. It was soon ordered back to this place and was engaged here and in field beyond the creek. On Monday a part of the command was engaged in front of the 3d Division. Its loss in the battle was 2 men killed and 6 men wounded; total, 8.

13th Missouri - 22nd Ohio

This is the second Missouri regiment in McArthur's Brigade that was later redisignated. The other one was the 14th Missouri, which became the 66th Illinois. Now we have the 13th Missouri, which later became the 22nd Ohio. In the battle it was commanded by Col. Crafts J. Wright.

On back of monument:
This regiment was detached from its brigade and ordered to report to Gen. Sherman. It became engaged here about 11 a.m., April 6, 1862. It was driven back to Jones field, rallied and returned to this place, where it was engaged until 2 p.m. It had present for duty, officers and men, 538. Its loss was 10 men killed; 3 officers and 67 men wounded; 1 man missing; total, 81.

58th Illinois

On back of monument:
58th Infantry,
Commanded by Col. Wm. F. Lynch.
This regiment held this line with slight changes of position from about 9.00 a.m., April 6, 1862, until its capture about 5.30 p.m. The regiment lost in battle 20 men killed; 8 officers and 39 men wounded; 223 men missing; total, 290.

57th Illinois

On back of monument:
57th Infantry,
Commanded by
1. Col. S. D. Baldwin.
2. Capt. G. A. Busse.
This regiment was held in reserve behind Richardson's Battery until about 2.00 p.m., April 6, 1862, when it was moved to this point in the line, and held its position until about 4 p.m., when it fell back to the Landing. The regiment lost in the battle 3 officers and 24 men killed; 7 officers and 103 men wounded; 3 men missing; total, 140.

52nd Illinois

On back of monument:
52d Infantry,
Commanded by 1. Major H. Stark.
2. Capt. E. A. Bowen.
This regiment was held in reserve until 4 p.m., April 6, 1862, when it formed for battle on this line and resisted the attack of the enemy until withdrawn for the night. Its loss in the battle was 1 officer and 22 men killed; 3 officers and 120 men wounded; 9 men missing; total, 155.

50th Illinois

On back of monument:
50th Infantry,
Commanded by
1. Col. M. M. Bane, Wounded.
2. Capt. T. W. Gaines.
Went into position on this line about 10.30 a.m., April 6, 1862, and held its ground until 2.00 p.m., when the regiment retired toward the Landing. Its loss in the battle was 12 men killed; 3 officers and 66 men wounded; 4 men missing; total, 84.

7th Illinois

On back of monument:
7th Infantry,
Commanded by Major Richard Rowett.
Went into position here about 9.00 a.m., April 6, 1862; advanced to right and front, and after a sharp encounter fell back to this position where its greatest loss occurred. About 4 p.m. it moved to assist McClernand. Loss in the battle, 2 officers killed; 2 wounded; 15 men killed; 79 wounded; 1 missing; total, 99.

8th Iowa

On back of monument:
Iowa
8th Regiment Infantry Volunteers,
Commanded by Col. James L. Geddes.
The regiment held this position from about 11 a.m., April 6, 1862, until about 4 p.m., when it changed front to the left and held this second position until about 5 p.m. When nearly surrounded it attempted to retreat but finding all avenues of escape cut off, surrendered about 6 p.m. The regiment entered the engagement with an aggregate of about 600 men. Its loss was, killed, 40; wounded, (18 mortally) 113; missing, 340; total, 493.

2nd Iowa

On back of monument:
Iowa
2d Regiment Infantry Volunteers,
Commanded by Lieut. Col. James Baker.
This regiment held this position from about 9 a.m. until 4.30 p.m., April 6, 1862, successfully resisting repeated assaults from the enemy's infantry and heavy fire of his artillery. Then, being nearly surrounded, it was ordered to fall back, which it did in good order, through a heavy cross fire from both flanks, to a point about one mile from this place, where it formed in line and held its position until darkness closed the fighting for that day. On April 7th the regiment moved out early, in reserve, and was at different times under fire. About 2 p.m. it was ordered by General Nelson to charge across a field on the enemy in the woods beyond, which was done in most gallant manner, the enemy retiring. This ended the two days fighting for this regiment. Number engaged, 490. Its loss was, killed and wounded, 68; missing, 4; total, 72.

7th Iowa

On back of monument:
Iowa
7th Regiment Infantry Volunteers,
Commanded by Lieut. Col. J. C. Parrott.
On the morning of April 6, 1862, the regiment, as part of the brigade, formed in line of battle on the left of the 2d Iowa Volunteer Infantry, on a sunken road, the center of the regiment being where this monument stands. It held its position, repelling a number of attacks, until late in the afternoon, when the brigade was ordered to fall back. In the retreat the regiment was subjected to a severe fire from both sides. It reformed in a new line of battle along a road leading to the Landing, and held that position during the night. On the morning of April 7th the regiment was assigned to the reserve and, under orders from General Crittenden, charged and captured one of the enemy's batteries. Present for duty, including officers, musicians, teamsters, etc., 383. Its loss was, 1 officer and 9 men killed; 17 men wounded; 7 men missing; total, 34.

The 7th Iowa monument is the one in the center of this picture. The Iowa monument on the right is for the 12th Iowa. Apparently I did not take individual pictures of these two monuments. I'm not sure why I didn't take shots of the front when I did the shots of the back. It must be because all Iowa monuments look alike. Next time I'm there I'll have to correct this mistake.

12th Iowa

On back of monument:
Iowa
12th Regiment Infantry Volunteers,
Commanded by Col. J. J. Woods, (Wounded and captured),
Capt. S. R. Edgington, (Captured).
This regiment held this position against repeated attacks, from 9 a.m. to 5 p.m., April 6, 1862. It then about-faced to meet an attack coming from the rear, and fought its way back to the camp of the 41st Illinois, where it was surrounded and captured at 5.30 p.m. Total number reported present for duty, including musicians, teamsters, etc., 489. Its loss, in the battle was, 2 officers and 15 men killed; 1 officer and 42 men wounded and left on the field; 33 men wounded and captured, and 20 officers and 366 men missing; total, 479. Of the wounded, 16 died of their wounds; of the missing 4 were never afterwards heard from; they were doubtless killed; of the missing 71 died in prison.

14th Iowa

On back of monument:
Iowa
14th Regiment Infantry Volunteers,
Commanded by Col. W. T. Shaw.
This regiment, (seven companies), held this position against repeated attacks from 9 a.m. until 4 p.m., April 6, 1862. In attempting to follow the rest of the brigade, which was being withdrawn, it became hotly engaged about 200 yards east of this position. Repulsing this attack it continued to retire towards the Hamburg road, fighting heavily. Reaching the camp of the 32d Illinois Infantry it found itself entirely surrounded by the junction of the Confederate right and left wings. It was captured about 6.00 p.m. Present on duty, including musicians, teamsters, etc., 442. Loss, killed, 8 men; wounded, 2 officers and 37 men; captured, 15 officers and 211 men; total, 273. Of the wounded, 5 died of their wounds; of the captured, 15 died in prison.

17th Illinois

On back of monument:
17th Infantry,
Commanded by
1. Lieut. Col. Enos P. Wood.
2. Major Francis M. Smith.
This regiment formed the right of the Third Brigade, 1st Division, and went into battle on this line about 8.30 a.m., April 6, 1862, holding it until 10 a.m., when it fell back about 60 yards. The regiment lost in the battle 5 officers and 113 men wounded; 15 men killed; 5 missing; total, 138.

29th Illinois

On back of monument:
29th Infantry,
Commanded by Lieut. Col. Chas. M. Ferrell.
Went into battle on this line at 8.30 a.m., April 6, 1862, and held it until 10.00 a.m., then retreated to a position north of Corinth road facing Purdy road. It lost in the battle 3 officers and 9 men killed; 2 officers and 71 men wounded; 4 men missing; total, 89.

43rd Illinois

On back of monument:
43d Infantry,
Commanded by Lieut. Col. A. Englemann.
This regiment formed on its color line on the morning of April 6, 1862, and moved forward to a position supporting Waterhouse's Battery, which was held until 10:00 a.m., when it fell back to this point and formed a line with the rest of the brigade. Its loss in the battle was 5 officers and 45 men killed; 7 officers and 111 men wounded; 29 men missing; total, 197.

49th Illinois

On back of monument:
49th Infantry,
Commanded by Lieut. Col. Phineas Pease, Wounded.
This regiment fell in for battle on its color line about 8.30 a.m., April 6, 1862, and held it but a short time when it moved back fighting to this place. Its loss in the battle was 2 officers and 17 men killed; 4 officers and 79 men wounded; 8 men missing; total, 110.

11th Illinois

On back of monument:
11th Infantry,
Commanded by
1. Lieut. Col. T. E. G. Ransom, Wounded.
2. Major Garrett Nevins, Wounded.
3. Capt. L. D. Waddell.
Went into battle on this line with 9 companies (one company on picket) about 9.00 a.m., April 6, 1862, receiving a fire that killed or wounded, in a few minutes, the Lieut. Colonel, Major, four line officers and many men. This position was held about two hours when they fell back 500 yards. The regiment lost in the battle 1 officer and 16 men killed; 4 officers and 65 men wounded; 17 men missing; total, 103.

Note:

I would have included a picture of the headquarters monument for Marsh but none exists. You can read his official report here. Interestingly he signed it "March" but it appears on monuments as "Marsh."

20th Illinois

On back of monument:
20th Infantry,
Commanded by
1. Lieut. Col. E. Richards, Wounded.
2. Major F. A. Bartleson, Wounded.
3. Capt. O. Frisbie.
Went into position here about 9.00 a.m., April 6, 1862, and held it until 11 a.m., when it withdrew, going to the rear of its own camp where it formed a new line. The regiment lost in the battle 1 officer and 21 men killed; 5 officers and 102 men wounded; 7 men missing; total, 136.