 The regiment's veterans and recruits were assigned to the 1st Michigan Infantry.The Fourth Michigan Infantry was reorganized under orders of July 26, 1864 and mustered into Federal service as a regiment on October 14, 1864.On May 26, 1866, the regiment was mustered out of service in Houston, Texas.The regiment suffered 12 officers and 177 enlisted men who were killed in action or mortally wounded and 1 officer and 107 enlisted men who died of disease, for a total of 297 
fatalities.