The marker for the Second and Tenth U.S. Infantry is on the east side of Rodman Avenue, near the Boonsboro Pike. (Rodman Avenue tour map)

From the marker:

U.S.A.

Fifth Army Corps

Second (9 Cos.) and Tenth (3 Cos.) U.S. Infantry 
Lieut. John S. Poland, 2d U. S. Infantry, Commanding.

September 17, 1862.

About noon of the 17th, the Battalion of the Second and Tenth U.S. Infantry crossed the Antietam and moved to the support of the Horse Batteries on the left (south) side of the Boonsboro Pike. After the withdrawal of these Batteries, Poland deployed the entire Battalion as skirmishers and, under heavy fire of canister and musketry, advanced to this point (Sherrick’s Lane), his right resting on the Boonsboro Pike, his line extending to the left, along the lane fence, in the direction of Sherrick’s House, on the road to Burnside Bridge. In this position he engaged the skirmishers of Garnett’s Brigade, his right advancing some distance beyond the farm lane and driving the enemy’s cannoneers from their guns on Cemetery Hill.

While thus engaged the 17th Michigan and the skirmishers of Willcox’s Division came up and relieved the left of his line, and the First Battalion, 14th U.S. Infantry formed about 210 yards in rear of his right.

Poland assembled his skirmishers on the center, and the Battallion of the 14th U.S. Infantry threw forward skirmishers on the right of the line.

His ammunition being exhausted, Poland withdrew to the cover of the hill east of this tablet and at dusk recrossed the Antietam.

No. 77.

See more on the history of the 2nd United States Infantry or the 10th United States infantry in the Civil War