Dr. Winne entered the Union Army as an assistant surgeon, Aug. 5, 1861. His reports to the Medical Director of the Army of the Potomac, Lieut. Col. Thomas A. McParlin, include the four divisional and the artillery brigade hospitals of the V Corps. His journal begins with the Battle of the Wilderness as Gen. U.S. Grant starts the Army of the Potomac towards Richmond. Dr. Winne kept daily records of the casualties and movements of ambulance trains until the V Corps began its march back to Washington in May of 1865. Interspersed among the statistics is a narrative of troop movements, fighting, weather conditions, health of the troops, and descriptions of wounds and of the workings of the Medical Dept. of Army of the Potomac. Dr. Winne gives details, such as names of the medical personnel.