 Complete the following phrase:  The 17th Battalion was an infantry battalion of the Australian Army. Although its numerical designation was bestowed upon it during World War I, the 17th Battalion can trace its lineage back to 1860, when a unit of the New South Wales Volunteer Rifles was raised in St Leonards, New South Wales. This unit has since been disbanded and reformed a number times. Through its links with the units of the colonial New South Wales defence force, the battalions history includes service in the Sudan and 