The head count on Saturday 12, 2022, Convoy to Canberra has been more than over exaggerated. Here is the evidence there is no truth to the myth of 1 million people attending.
https://www.mapchecking.com/#bAACgQMM3DcLQIBVDAACIQeM3DcJ2IBVDizgNwrsgFUMUOQ3CnCAVQ3E4DcJbIBVD
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The total attending is just short of 250,000 people.