The One Hundred and Thirty-third Infantry Illinois Volunteers was organized at Camp Butler, Ill., by Colonel Thaddeus Phillips, and mustered in for one hundred days, May 31st, 1864.

On the 3d of June, moved to Rock Island Barracks, and was assigned to duty, guarding prisoners of war.  The Regiment performed the duty faithfully and efficiently during its term of service.

On the 24th of September, 1864, was mustered out of service, at Camp Butler, Ill.

[See remarks which precede the roster of the One Hundred and Thirty-second Infantry for further history of the service of the Regiment.]