the 156th infantry reorganized on 1 may 1963 to consist of the 1st, 2nd, 3rd, and 4th battalions, elements of the 39th infantry division/ it reorganized on 1 december 1967 to consist of the 1st, 2nd, and 3rd battalions, elements of the 256th infantry brigade; on 1 march 1977 to consist of the 2nd and 3rd battalions, elements of the 256th infantry brigade; on 1 july 1991 to consist of the 2nd and 3rd battalions, elements of the 256th infantry brigade, and the 4th battalion; and on 1 february 1993 to consist of the 2nd and 3rd battalions, elements of the 256th infantry brigade. as part of the 256th ibct the unit deployed twice to iraq, in 2004-5 and again in 2010.