 Indianapolis's "City Regiment" mustered into service as the 132nd Indiana Infantry Regiment in May 1864 as one of several regiments of Hundred Days Men.The regiment guarded railroads in Tennessee and Alabama, which were firmly in the control of Union forces, to relieve the regular U.S. army troops for active duty on the front lines.The 132nd Indiana, which was formed mostly of young boys and older men, was a favorite among Indianapolis citizens.