Throughout the Cold War period which followed, the composition of the brigade changed a number of times as the role of part-time military forces evolved.

In 1921 it was re-raised as a unit of Australia's part-time military forces before being amalgamated with the 22nd Battalion in 1930.

There were also many part-time forces, often called volunteers, and they were not in short supply.

In 1946, the regiment was reconstituted as a component of the country's part-time forces and reformed First City.

A small rural constabulary (part-time force) had existed earlier but was disbanded.

It was later re-raised as part of the Australia's part-time military forces during the inter war years.

In general, the militia is a part-time force with only light arms which are issued to them only on occasion.

Following the war, Australia's part-time military force was not re-raised until 1948.

He also continued his sporting interests and in 1936 rejoined the part-time military forces, which was then known as the Militia.

In 1921, Australia's part-time military force was reorganised.