Eight regiments of Indiana infantry (132nd to 139th, inclusive) organized in 1864, and known as the "Hundred-Day" men, because their enlistment was for that period, were somewhat distinctive in their origin. Campaigns on a huge scale against Atlanta and Richmond were intended, and the demand for men exceeded the response. Both Grant and Sherman were urging more support, but the country had been drained by repeated calls. In this contingency the governors of Indiana, Ohio, Illinois, Iowa and Wisconsin, led, it is claimed, by Morton, met in conference and devised a plan for raising volunteers on short enlistment who might aid the proposed campaigns by guarding railroads, depots, and fortifications in the rear of the armies, or doing similar service, thus relieving disciplined troops who could be used at the front. By arduous effort Morton succeeded in raising 7,415 men, and these served in Tennessee and Alabama by releasing veterans for duty on the firing line, thus materially strengthening the arm in the Atlanta campaign.