 Complete the following phrase:  The 1st Battalion was an infantry battalion of the Australian Army. Although its numerical name was designated during the First World War, the 1st Battalion can trace its lineage back to 1854, when a unit of the Volunteer Rifles was raised in Sydney, New South Wales. This unit has since been redesignated a number of times, but through its links with the units of the colonial NSW defence force, the battalions history includes services in Sudan and 