 Complete the following phrase:  During World War I, the 12th Brigade was re-raised in early 1916 as part of the expansion of the all volunteer First Australian Imperial Force. The brigade was formed in Egypt from a cadre of experienced personnel who had served during the Gallipoli Campaign as part of the 4th Brigade. Attached to the 4th Division and consisting of four infantry battalionsthe 45th, 46th, 47th and 48th Battalionsit served in the trenches of the Western Front from June 1916 onwards. During this time, the brigade fought in several significant battles including the 