 After recuperating in Wisconsin (during which time he married Mary Madson, 1843–1903), Wilson returned in November 1863 as acting commanding officer of the Scandinavian Regiment during the Battle of Rocky Face Ridge, Resaca and Pickett's Mill (during which the regiment suffered particularly heavy casualties) before turning command over to Col. Ole Johnson in July 1864.Wilson remained with the regiment, serving in an additional 26 military engagements, until the war's end in 1865.Becoming a successful businessman in La Crosse County, Wisconsin, following the war, Wilson began a bank and steamship business under Wilson & Jurgens, as well as a partnership in a meat salting company.