Commonwealth Security Services

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The Commonwealth Security Service (CSS) was an arm of the earlier forms of the Commonwealth Police of Australia.

It operated in the 1930s and 1940s, and was amalgamated with the Commonwealth Investigation Branch, to form the Commonwealth Investigation Service (CIS) in 1946.[https://www.naa.gov.au/explore-collection/intelligence-and-security/history-australian-intelligence-and-security#security-intelligence History of Australian intelligence and security] naa.gov.au{{cite news |url=http://nla.gov.au/nla.news-article95671920 |title=Security Services |newspaper=Kalgoorlie Miner |location=Western Australia |date=30 May 1950 |access-date=11 January 2020 |page=5 |via=Trove }}

It was involved in monitoring events and organisations considered problematic by the government of the time,{{cite news |url=http://nla.gov.au/nla.news-article55849480 |title=Reds regain papers |newspaper=The Mail (Adelaide) |location=South Australia |date=9 December 1950 |access-date=11 January 2020 |page=54 |via=Trove }}{{cite news |url=http://nla.gov.au/nla.news-article132580128 |title=LOOSE TALK |newspaper=Illawarra Mercury |location=New South Wales, Australia |date=20 November 1942 |access-date=11 January 2020 |page=5 |via=Trove }} including strikes 1948 Queensland railway strike{{Citation | author1=Olive, Doug | title=The Queensland railway strike, February-April 1948 | publication-date=1948 | publisher=[Australian Communist Party? | url=https://trove.nla.gov.au/work/11872343 | accessdate=11 January 2020 }}