title: Michael Bruxner
context: Bruxner started his military career when he was commissioned as a second lieutenant on 11 September 1911 in the 6th Australian (New England) Light Horse, Citizen Military Forces, which was redesignated the 5th the following year. When the First World War broke out in September 1914, Bruxner joined up soon after on 10 October 1914 with the 6th Light Horse Regiment in the Australian Imperial Force.[5] Promoted to captain, Bruxner was sent with his unit to take part in the Gallipoli Campaign, being wounded several times. Later, in 1916, he commanded the 6th during part of the Battle of Romani and served with distinction in the Sinai and Palestine Campaign, for which he was mentioned in despatches twice.[5][6] On 30 May 1917 was appointed by the President of France, Raymond Poincaré, as a Chevalier of the Légion d'honneur "in recognition of distinguished services during the campaign".[5][7] Also in 1917, Bruxner was appointed to General Headquarters and rose to be assistant adjutant and quartermaster-general of the ANZAC Mounted Division.[5] For his service he was promoted to lieutenant colonel and appointed as a Companion of the Distinguished Service Order (DSO) in 1919.[8]
question: When did Michael Frederick Bruxner become a Lieutenant Colonel?
answers: 1919