The 1st Brigade is the largest unit of the New Zealand Army, and contains most of the army's deployable units. The brigade was formed on 13 December 2011 by amalgamating the 2nd Land Force Group and 3rd Land Force Group. Its establishment formed part of the 'Army 2015' package of reforms. In 2011 the 1st Brigade was reformed from the headquarters of the 2nd Land Force Group at Linton Camp.