the unit was reorganized on 1 may 1959 as the 185th infantry, a parent regiment under the combat arms regimental system, to consist of the 1st battle group, an element of the 49th infantry division; on 1 march 1963 to consist of the 1st and 2nd battalions, elements of the 49th infantry division (the 2nd battalion was relieved on 4 december 1963 from assignment to the 49th infantry division and assigned to the 49th infantry brigade); and on 29 january 1968 to consist of the 2nd battalion, an element of the 49th infantry brigade.