The following lists events that happened during 1919 in Australia. Incumbents Monarch – George V Governor-General – Sir Ronald Munro-Ferguson Prime Minister – Billy Hughes Chief Justice – Samuel Griffith (until 17 October) then Adrian Knox (from 18 October) State premiers Premier of New South Wales – William Holman Premier of Queensland – T. J. Ryan (until 22 October), then Ted Theodore Premier of South Australia – Archibald Peake Premier of Tasmania – Walter Lee Premier of Victoria – Harry Lawson Premier of Western Australia – Sir Henry Lefroy (until 17 April), then Sir Hal Colebatch (until 17 May), then James Mitchell State governors Governor of New South Wales – Walter Davidson Governor of Queensland – Hamilton Goold-Adams Governor of South Australia – Sir Henry Galway Governor of Tasmania – Francis Newdegate Governor of Victoria – Sir Arthur Stanley Governor of Western Australia – William Ellison-Macartney Events 8 January – Strike leader Paul Freeman was arrested outside of Dobbyn, Queensland, sparking a chain of events that would lead to his deportation. 1 March – The Potts, believed to be the world's longest running cartoon strip drawn by the same artist, is first published in The Sun News-Pictorial. 24 March – one of the most notable incidents of the Red Flag Riots occurred in Brisbane, Queensland, when a crowd of returned servicemen clashed with police. The incident had been sparked the previous day by a socialist demonstration against the continued operation of the War Precautions Act, which had angered many of the returned soldiers. 1 June – A mutiny breaks out on the Royal Australian Navy battlecruiser shortly after it arrives in Fremantle, Western Australia. 28 June – The Treaty of Versailles is signed in France, bringing Australia's involvement in World War I to an end. 18 October – Sir Adrian Knox is appointed Chief Justice of the High Court. 28 October – The Treaty of Peace (Germany) Act 1919 receives Royal Assent, confirming Australia's membership as a sovereign nation in the new League of Nations, and indicating Australia's independence from the United Kingdom. 10 December – Keith and Ross Smith, piloting a Vickers Vimy, reach Darwin at the end of the first England to Australia flight. 19 December – A federal election is held. The incumbent Nationalist Party of Billy Hughes defeats the Australian Labor Party of Frank Tudor. 24 December – The Electrical Trades Union of Australia is federally