The 1917 Australian plebiscite was held on 20 December 1917. It contained one question. Are you in favour of the proposal of the Commonwealth Government for reinforcing the Australian Imperial Force oversea? Background The 1917 plebiscite was held a year after the highly contentious 1916 conscription plebiscite. The 1916 plebiscite had resulted in a surprise "no" vote, with voters in Queensland, New South Wales and South Australia, as well as a majority of electors nationwide, rejecting the proposal. The political fallout was swift and, by November 1916, had led to the collapse of the First Hughes Ministry. That was associated with a split in the ruling Australian Labor Party, with Prime Minister Billy Hughes and some Labor MPs forming the breakaway National Labor Party which, by February 1917, had merged with the conservative Commonwealth Liberal Party to form the Nationalist Party of Australia. While the Nationalist Party was dominated by former Commonwealth Liberals, it retained Hughes as leader. After Hughes and the Nationalists scored a convincing victory at the 1917 election, Hughes announced that a second plebiscite on the question of conscription would be held on 20 December 1917. During the course of World War 1, 38.7% of eligible Australian men enlisted for service — around 420,000 out of an eligible population of a little over 1 million. During the war, the range of men eligible to volunteer was expanded, with the initial age range of 19–38 expanded to 18–45 in June 1915. At the same time, medical standards were lowered. For example, by April 1917 the minimum height had dropped from in August 1914 to . Despite that, there was a marked decrease in the number of enlistments after 1915, with the average in 1917 being fewer than 4,000 per month: 1914: 52,561 1915: 165,912 1916: 124,352 1917: 45,101 The 1917 plebiscite The proposal for the 1917 plebiscite was less far reaching than that of the 1916 poll, eschewing full conscription of able-bodied men and instead proposing to conscript men between the ages of 18 and 44 through a ballot system, and only in months where voluntary enlistments fell below 7,000 men. The plebiscite was held due to the Australian Government's desire to increase the recruitment of forces for overseas service to a total of 7,000 men per month. It was conducted under the War Precautions (Military Service Referendum) Regulations 1917. It formed part of the larger debate on