I believe the following will answer your query. I wouldn't doubt he saw prior service in a European Army.
Ernest Julius Meyers
Residence Eau Claire WI;
Enlisted on 11/12/1861 as a 1st Sergeant [Orderly Sergeant.]
On 11/12/1861 he mustered into "L" Co. WI 2nd Cavalry
He was discharged for promotion on 3/18/1865
On 3/18/1865 he was commissioned into
US Volunteers Adjutant Genl Dept
He was Mustered Out on 10/19/1865
* 1st Lieut 5/12/1862 (As of Co. H)
* Capt 7/2/1863
* Capt 3/18/1865 (Capt & Asst Adjutant General)
Intra Regimental Company Transfers:
* 5/12/1862 from company L to company H
born in Germany
From Mar '63 to Jun '63, attached to 3rd Brigade, 5th Division, Left Wing of the 16th Corps., Department of the Tennessee
2nd Regiment, Wisconsin Cavalry
Organized at Milwaukee, Wis., December 30, 1861, to March 10, 1862. Left State for St. Louis, Mo., March 24, 1862. Duty at Benton Barracks, Mo., till May 15. Moved to Jefferson City, thence to Springiield, Mo., and duty there till June 14. Attached to Steele's Command, Army of Southwest Missouri, Dept. of Missouri, to July, 1862. District of Eastern Arkansas, Dept. of Missouri, to November, 1862. 2nd Brigade, Cavalry Division, District of Eastern Arkansas, Dept. of the Tennessee, to January, 1863. 2nd Brigade, 2nd Cavalry Division, 13th Army Corps, Dept. of the Tennessee, to February, 1363. 3rd Brigade, District of Memphis, Tenn., Sth Division, 16th Army Corps. Dept. of the Tennessee, to June, 1863. Busseys Cavalry Brigade, Herron¿s Division, 13th Army Corps, to August, 1363. Cavalry Brigade, 17th Army Corps, to September, 1363. 1st Division, 17th Army Corps, to January, 1364. Winslow a Cavalry Brigade, District of Vicksburg, Miss., to December, 1864. 3rd Brigade, Cavalry Division, District of West Tennessee, to July, 1865. 2nd Brigade, 2nd Cavalry Division, Military Division Gulf, to August, 1865. Dept. of Texas to November, 1865.
SERVICE.-March to Batesville, Jacksonport and Helena, Ark., June 14-July 12, 1862, and duty there till January, 1863. Action at Yellville, Ark., June 25, 1862. Near Fayetteville July 15. Expedition from Helena to Moro August 5-8 (Detachment). Near Helena August 11. Near Helena September 19-20. Expedition against Arkansas Post November 16-21. Expedition to Yellville Noveinber 25-29. Expedition from Helena to Grenada, Miss., November 27-December 5. Oakland, Miss., December 3. LaGrange, Ark., December 30. Lick Creek, Ark., January 12, 1863. Clarendon Road, near Helena, January 15. Ordered to Memphis, Tenn., February 4, and duty there till May. Nonconah Creek, near Memphis, April 4. Expedition to Coldwater April 17-20. Horn Lake Creek May 18 (Co. "L"). Expeditions to Hernando, Miss., May 23-24, 26 and 28 (Detachments). Moved to Vicksburg, Miss., June 10-13. Siege of Vicksburg , Miss., June 13-July 4. Advance on Jackson, Miss., July 4-10. Clinton July 8. Siege of Jackson July 10-17. Canton July 12. Expedition to Yazoo City July 12-21, 1863 (Detachment). Bolton's Depot July 16. Grant's Ferry, Pearl River. July 16. Briar Creek, near Canton, July 17. Duty at Red Bone Church till April 27, 1864. Action at Red Bone Church September 25, 1863. Ingraham's Plantation, near Port Gibson, October 10. Red Bone April 21, 1864. Moved to Vicksburg April 27, and duty there till December. Salem May 29 (Detachment). Worthington's and Sunnyside Landings, Fish Bayou, June 5. Old River Lake or Lake Chicot June 6. Expedition from Vicksburg to Pearl River July 2-10. Clinton July 4. Jackson July 5-6. Clinton July 7. Expedition from Vicksburg to Rodney and Fayette September 29-October 3. Port Gibson October 1. Fayette and Cole Creek October 3. Expedition from Natchez to Woodville October 4-11. Woodville October 5-6. Fort Adams, La., October 5 and 7. Operations in Issaqueena and Washington Counties October 24-31. Expedition from Vicksburg to Gaines' Landing and Bayou Macon, La., November 6-8. Expedition from Vicksburg to Yazoo City November 23-December 4. Concord Church December 1. Moved to Memphis, Tenn., December 8. Grierson's Expedition to destroy Mobile & Ohio Railroad December 21, 1864, to January 15, 1865. Franklin Creek December 21-22, 1864. Egypt Station December 28. Expedition from Memphis to Marion, Ark., January 19-22, 1865 (Detachment). Duty at Memphis, Tenn., till June. Expedition into Northern Mississippi March 3-11. (Part of Regiment ordered to Grenada, Miss., May 9, and duty there till June 24, when rejoined Regiment at Alexandria, La.) Ordered to Alexandria, La., June, March from Alexandria to Hempstead, Texas, August 8-26, and duty there till October. March to Austin, Texas, and there mustered out November 15, 1865.
1st Battalion (Cos. "A," "D," "G" and "K") served detached June 13, 1862, to September, 1864. Ordered to Cassville, Mo:, June 13, 1862, and duty there till October, 1862. Pineville June 23. Attached to 1st Brigade, 3rd Division, Army of the Frontier, Dept. of Missouri, to June, 1863. District of Rolla, Dept. of Missouri, to August, 1864. District of North Missouri to September, 1864. Duty at Osage Springs, Mo., October, 1862, to December, 1862. Battle of Prairie Grove , Ark., December 7. Expedition over Boston Mountains to Van Buren, Ark., December 27-29. At Forsythe, Mo., till March, 1863. At Lake Springs till June, 1863. At Rolla till September, 1864. Lane¿s Prairie, Mo., May 26, 1864. Scout in Phelpa and Marlas Counties August l (Co. "A"). Rejoined Regiment at Vicksburg, Miss., September, 1864.
Regiment lost during service 24 Enlisted men killed and mortally wounded and 4 Officers and 234 Enlisted men by disease. Total 312.