Prime MInister Gough Whitlam was dismissed by Governor-General Sir John Kerr in 1975.

Prime MInister Gough Whitlam was dismissed by Governor-General Sir John Kerr in 1975.

Were US agencies behind the Dismissal?

Ever since Labor Prime Minister Gough Whitlam was dismissed from his position in November 1975, conspiracy theories have existed.

Whitlam was sacked by then Governor-General Sir John Kerr in Australia's largest constitutional crisis. Since then, powerful theories linking ASIO and other agencies to the Dismissal have been aired.

ANU Strategic and Defence Studies Centre senior fellow Dr John Blaxland discusses ASIO's alleged role in the dismissal of Whitlam in his book, The Protest Years, The Official History of ASIO, 1963-1975.

"Of course no scandal of this size is complete without its conspiracy theories," Blaxland says.

"And one of the big ones is whether American intelligence had any role to play in prompting Sir John Kerr to do what he did."

Blaxland believes there were concerns about US intelligence getting close to the Whitlam government right from its start, with Whitlam himself not wanting his ministerial staff to be security vetted by ASIO.

To find out more about the conspiracy theories, play the video below.