The Fourth Michigan Infantry left Adrian, June 25, 1861, with a force of 1,025 men which was increased within the succeeding year to 1,156. This regiment took part in the first Bull Run battle and served in the vicinity of Washington. Its heavy losses sustained in every field from New Bridge, May 24 to Fredericksburg, December 14, 1862, tell the story of its first years in service. Towards the close of the year, its strength was reduced to 753 officers and men.

During the year, 1863, it participated in all the brilliant actions of the Potomac and Rappahannock. The loss sustained by death was eighty-one, wounded one hundred thirty-five and one hundred five prisoners.

During 1864, the Fourth shared the fortunes of the Third as when the term of enlistment expired, it was relieved and reported at Detroit for muster out, June 26-30.

The Fourth Infantry, reorganized, was mustered in under Colonel Jairus W. Hall, October 14, and left for Decatur, Alabama on the 22^nd. During its short period of service, its losses, one killed and four wounded in the defense of the town against General Hood, October 28^th. It participated in the affairs at Decatur on October 28-30; those of New Market, Alabama, November 19 and 20 and served at Murfreesboro, Tennessee from November 20 to December 10, 1864. The command arrived at Detroit, June, 10, 1865, and was discharged.