The Gates brothers were the sons of Oliver Uriah Gates (1802-1880) and Catherine Hull (1800-1875). The couple had seven children, three daughters and four sons: Samuel born November 11, 1826 - there is no additional information about Samuel.
Edmund Uriah born July 8, 1832 died January 7, 1917; James Oliver born January 6, 1836 died February 11, 1890; Levi born September 7, 1839 died March 29, 1919, all enlisted in the Civil War.
Edmund Uriah GATES
Enlisted Nov. 2, 1864. Mustered Nov. 2, 1864, Iowa. Mustered out July 21, 1865, Louisville, Kentucky.
Further research resulted in records for Edmund Uriah Gates: ROSTER AND RECORD OF IOWA TROOPS IN THE REBELLION, Volume 2: SERVICE RECORD: THIRTEENTH REGIMENT IOWA VOLUNTEER REGIMENT, COMPANY E: Page 62. Gates, Edmund W. Age 32. Residence Fourth Congressional District, nativity Ohio. Enlisted Nov. 2, 1864. Mustered Nov. 2, 1864. Mustered out July 21, 1865, Louisville, Kentucky.
James Oliver GATES
Note: I have no photo. If anyone out there has a photo of James Oliver, please contact me. Thanks.
Gates was 28, and residing in Mahaska County, Iowa, when he enlisted as a Private in Company F
of the 4th Iowa Cavalry on January 5, 1864. He was mustered in on January 21, 1864, and mustered out with his company on August 8, 1865, in Atlanta.
SOURCE: "Roster and Record of Iowa Soldiers in the War of the Rebellion: together with historical sketches of volunteer organizations." Published by authority of the General Assembly, under the direction of Brig. Gen. Guy E. Logan, Adjutant General, DES MOINES EMORY H. ENGLISH, STATE PRINTER, E. D. CHAPSELL, STATE BINDER 1910, page 721. Link at https://archive.org/stream/rosterrecordofio41iowa/rosterrecordofio41iowa_djvu.txt:
Levi A. GATES
Enlisted August 9, 1862, Iowa. Wounded and captured, then mustered out August 24, 1865.
36th Regiment, Iowa Infantry, Company B, Levi Gates enlisted August 9, 1862, wounded and captured at Mark's Mill.
Wapello County Civil War Records: http://archive.org/stream/historyofwapello01inwate#page/380/mode/2up
Further Research - CITIZENS AND PATRIOTS, A History Of The 36TH Iowa Volunteer Infantry Regiment In The Civil War By Jon B. Hittle.
WAPELLO COUNTY HISTORY Published by Wapello County History Committee;
printed by Sutherland Printing Company Inc; Montazuma, Iowa, 50171; printed in 1985.
SOURCE: Find a Grave Member March 2014.
Wapello County History; excerpt pages 420 and 421.
The Gates Family:
"Edmund, James and Levi Gates all served in the Civil War. On August 9, 1862, Levi enlisted for a three-year term in Company B 36th Iowa Infantry, a volunteer regiment organized by Mayor A. H. Hamilton in Wapello County.
Levi was wounded April 25, 1864 in the Battle of Marks' Mills, Arkansas, and left in the field for dead. When night came he crawled into a deserted cabin. A colored woman cared for him until he was taken to the Marks' Mills Rebel Prison where he was treated by both Rebel and Union doctors. Later he received treatment at hospitals in Little Rock, Arkansas and Keokuk, Iowa. After he recovered, he rejoined his regiment and served until he was discharged August 24, 1865."
Read more about the Battle at Marks' Mill on Wikipedia.