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
Total killed and wounded 366
On back of monument:
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.