According to Dyer's Compendium of the War of the Rebellion, p 1671:
6th Independent Battery Light Artillery [Buena Vista Artillery]
Organized and mustered in 10/02/1861 at Racine, WI
03/15-16/1862, moved to St. Louis, MO then to New Madrid, MO, 03/19-20/1862; reported to Gen Pope & attached to Arty Div, Army of MS to Sept 1862; Arty, 3rd Div, Army of MS, to Nov 1862; Arty, 7th Div, 16th Army Corps, to Jan 1863; Arty, 7th Div, 17th Army Corps, to Sept 1863; Arty, 2nd Div, 17th Army Corps, to Dec 1863; Arty, 3rd Div, 15th Army Corps, to Nov 1864; Garrison Arty, Nashville, TN, Dept of the Cumberland, to Feb 1865; Arty Reserve, Chattanooga, TN, Dept of the Cumberland, to July 1865
SERVICE: Duty in fortifications of New Madrid and Island No. 10 to 04/19/1862
Moved to Hamburg Landing, TN 04/19-28/1862
Advance on & siege of Corinth, MS 04/29/1862-05/30/1862
Pursuit of enemy to Booneley 06/23-29/1862 & duty here to 08/14/1862
Move to Iuka, MS 08/14/1862, then march to Nashville, TN 08/21/1862-09/03/1862
March to Louisville, KY in pursuit of Bragg 09/23-26/1862
Pursuit of Bragg to Crab Orchard, KY 10/01-15/1862
Battle of Perryville, KY 10/08/1862
March to Nashville, TN 10/19/1862-11/06/1862 & duty here to 12/26/1862
Wilson's Creek Pike 12/25/1862
Advance on Murfreesboro 12/26-30/1862
Nolensville 12/26-27/1862
Battle of Stone's River 12/30-31/1862 & 01/01-03/1863
Duty at Murfreesboro to June 1863
Expedition to Franklin 01/31/1863-02/12/1863
Reconoissance from Salem to Versailles 03/09-14/1863
Operations on Edgefield Pike 06/04/1863
Middle Tennessee [or Tullahoma] Campaign 06/23/1863-07/07/1863
Liberty Gap 06/24-27/1863
Occupation of Middle Tennessee to 08/16/1863
Passage of the Cumberland Mountains & Tennessee River & Chickamauga, Ga Campaign 08/16/1863-09/22/1863
Battle of Chickamauga 09/19-20/1863
Siege of Chattanooga 09/24/1863-11/22/1863
Battle of Chattanooga 11/23-25/1863
Duty in Defenses of Chattanooga to January 1864
Re-enlisted 01/02/1864 & veterans on furlough Jan & Feb 1864
Atlanta Campaign 05/01/1864-09/08/1864
Tunnel Hill 05/06-07/1864
Demonstrations on Rocky Faced Riodge 05/08-11/1864
Buzzard's Roost Gap 05/08-09/1864
Battle of Resaca 05/14-15/1864
Rome 05/17-18/1864
Advance on Dallas 05/18-25/1864
Operations on line of Pumpkin Vine Creek & battales about Dallas, New Hope Church & Allatoona Hills 05/25/1864-06/05/1864
Operations about Marietta & against Kenesaw Mountain 06/10/1864-07/02/1864
Pine Hill 06/11/1864
Lost Mountain 06/15-17/1864
Assault on Kenesaw Mountain 06/27/1864
Ruff's Station 07/04/1864
Chattahootchie River 07/05-17/1864
Peach Tree Creek 07/19-20/1864
Siege of Atlanta 07/22/1864-08/25/1864
Utoy Creek 08/05-07/1864
Flank movement on Jonesboro 08/25-29/1864
Battle of Jonesboro 08/31/1864-09/01/1864
Operations against Hood in North Georgia & North Alabama 09/29/1864-11/03/1864
March to the Sea 11/15/1864-12/10/1864
Siege of Savannah 12/10-21/1864
Campaign of the Carolinas January to April 1865
Battle of Bentonville, NC 03/19-21/1865
Occupation of Goldsboro 03/24/1865
Advance on Raleigh 04/14/1865
Bennett's House 04/26/1865
Surrender of Johnston & his Army
March to Washington, DC via Richmond, Va 04/29/1865-05/17/1865
Grand Review 05/24/1865
Mustered out 06/06/1865
Battery lost during service 1 officer & 5 enlisted men killed and mortally wounded and 1 officer and 18 enlisted men by disease. Total 25.