On March 31, 1865, the 61st OVI was consolidated with the 82nd OVI. Robert Patterson transferred to the consolidated unit and was promoted to Captain, Company I of the 82nd OVI.
On April 26, 1865, Confederate General Joseph E. Johnston signed the surrender documents for the Confederate Army of Tennessee and other miscellaneous southern troops attached to his command, at Bennett’s Place, near Durham, North Carolina to General Sherman. The Civil War was over.
The 82nd OVI, along with the rest of Sherman’s army, marched through the Confederate capital, Richmond, Virginia, to Washington, D.C. where it participated in the grand review on May 24, 1865.
Robert Patterson mustered out of the 82nd OVI at Louisville, Kentucky on July 24, 1865.