the 1st battalion, 185th infantry regiment was originally constituted on 22 july 1885 as the 6th infantry battalion, california national guard. the unit was expanded, reorganized, and redesignated on 21 february 1888 as the 6th infantry regiment. it was mustered into federal service on 11 may 1898 at san francisco as the 6th california volunteer infantry; and mustered out on 15 december 1898 at fort point, ca. it was reduced and consolidated on 11 may 1907 with the 2nd infantry regiment, california national guard (organized in 1864 as the sacramento light artillery) to form the 2nd infantry regiment, california national guard, with headquarters at sacramento.