The history of the Australian Army can be divided into two periods, the 1901–47 period, when limits were set on the size of the regular Army, the vast majority of peacetime soldiers were in reserve units of the Citizens Military Force (also known as the CMF or Militia), and expeditionary forces (the First and Second Australian Imperial Forces) were formed to serve overseas.[3][4] The second period, which was post-1947, when a standing peacetime regular infantry force was formed and the CMF (known as the Army Reserve after 1980) began to decline in importance.[5][4]