 Complete the following phrase:  With the outbreak of the Second World War once again the government made the decision to form an overseas expeditionary force outside of the pre-existing Militia units. In order to maintain the ability of the Army to defend Australia should Japan enter the war, it was decided once again to limit the number of militiamen that were allowed to enlist in the Second Australian Imperial Force 2nd AIF to roughly one quarter. While the units of the 2nd AIF were sent overseas to England, North Africa and the Middle East, the militia remained in Australia to carry out various garrison duties and training in order to improve the nations overall readiness. Following Japans entry into the war in December 1941 this changed and over the course of 194245 many Militia units were mobilised and deployed to fight in New Guinea, 