4th Ohio Battery was an artillery battery that served in the Union Army during the American Civil War. Service The 4th Ohio Battery was organized in Cincinnati, Ohio and mustered in for three years service on August 17, 1861, under Captain Louis Hoffman. The battery was attached to Army of the West and Department of the Missouri to February 1862. 1st Division, Army of Southwest Missouri to May 1862. Artillery, 3rd Division, Army of Southwest Missouri to July 1862. District of Eastern Arkansas, Department of the Missouri, to November 1862. 2nd Brigade, 11th Division, Right Wing, XIII Corps, Department of the Tennessee, to December 1862. 2nd Brigade, 4th Division, Sherman's Yazoo Expedition, to January 1863. Artillery, 1st Division, XV Corps, Army of the Tennessee, August 1864. The 4th Ohio Battery ceased to exist on March 19, 1865, when its veterans and recruits were transferred to the 10th Ohio Battery. Detailed service Moved to St. Louis, Mo., August 21, 1861, then to Jefferson City and to Sedalia, Mo., September 30. Fremont's Campaign against Springfield, Mo., October 13–27. Duty at Springfield until November 8. Moved to Rolla, Mo., November 8, and duty there until February 1862. Curtis' advance on Springfield, Mo., February 2–13. campaign against Price in Missouri and Arkansas, February and March. Battles of Pea Ridge March 6–8. March to Batesville, Ark., April 5-May 8, and to Helena, Ark., May 25-July 14. Duty there until October. Expedition up Yazoo August 16–27. Capture of Steamer Fair Play August 17. Milliken's Bend August 18. Haines Bluff August 21. Bolivar Landing August 22. Greenville August 23. Ordered to St. Genevieve, Mo., October 7, then to Pilot Knob, Mo., and duty there until November 11. Moved to St. Genevieve, then to Camp Steele, and duty there until December 22. Sherman's Yazoo Expedition December 22, 1862, to January 3, 1863. Chickasaw Bayou December 26–28. Chickasaw Bluff December 29. Expedition to Arkansas Post, Ark., January 3–10, 1863. Assault and capture of Fort Hindman, Arkansas Post, January 10–11. Moved to Young's Point, La., January 17–23. Duty at Perkins' Plantation and Ballard's Farm until April 2. Expedition to Greenville, Black Bayou, and Deer Creek April 2–14. Demonstrations on Haines and Snyder's Bluff April 26-May 2. Movement to join the army in rear of Vicksburg, Miss., via Richmond and Grand Gulf May 2–14. Battle of Jackson, Miss., May 14. Siege of Vicksburg May 18-July 4. Assaults on Vicksburg May 19