Fall 1861
In early November, the War Department issued an order discontinuing enlistments for the cavalry service.
Nation and worldGrade A · 1 independent source
The evidence
“The organization of the Second cavalry regiment was authorized in the Fall of i86i, as an "independent acceptance," but was finally turned over to the State authorities. Early in November, 1861, the war department issued an order discontinuing enlistments for the cavalry service, and circulars were sent to the different State executives to consolidate all incomplete regiments. Ex-Governor Barstow, by authority of General Fremont,, which authority was confirmed by the General Government, had commenced the organization of a cavalry regiment — the Third Wisconsin — when Governor Randall received information that the authority of Barstow had been revoked.”
1879-history-of-rock-county/02-wisconsin-as-a-state.md, PDF p. 74
Butterfield, C. W., et al. The History of Rock County, Wisconsin: its early settlement, growth, development, resources, etc. Chicago: Western Historical Company, 1879. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871585.
Grade A: Found on a page of one of our sources
On the printed page (PDF p. 74) · open the whole page