 The battalion would maintain a similar role until 1995, although in 1971 it would be amalgamated with the 1st Battalion once more to form the 1st/19th Battalion, Royal New South Wales Regiment.Like many Australian infantry battalions, the 19th Battalion's lineage is a complex one.As a result of a series of re-organisations, the battalion can trace its origins to 1860 when a corps of volunteers was raised in the southern suburbs of Sydney becoming known as "South Sydney's Own", a part of the military forces of the New South Wales colonial defence force.