Secret Intelligence Australia

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For other uses, see Sia (disambiguation).

Secret Intelligence Australia (SIA) was a British World War II political unit commanded by Captain Roy Kendall who reported directly to Prime Minister Winston Churchill. SIA was known as Section B of the Allied Intelligence Bureau but was not accountable in any way to the Australians or the Americans. SIA was a signal intercept and code-breaking unit and was modeled on the MI6. SIA was charged with the "Collection of information of the enemy and his activities through certain special means and channels concerning which detailed secret instructions will be issued from time to time". The headquarters of SIA was at "Craigroyston" in Bowen Terrace, in the suburb of New Farm in Brisbane.