Members of the Australian Labor Party during Mayday procession in Brisbane, Australia 1969

Members of the Australian Labor Party during Mayday procession in Brisbane, Australia 1969.

Marchers in Mayday procession in Brisbane, Australia 1969

Marchers in Mayday procession in Brisbane, Australia 1969. They hold flags and one has placard reading Give a guerilla gun, support revolution now.

WWF Peace Committee float during Mayday procession in Brisbane, Australia

WWF Peace Committee float during Mayday procession in Brisbane, Australia. Banners include Drop prices not bombs and World peace for a better life. Men women and children are aboard the truck, some in costume.

Woman with sash in sportscar during May Day procession 1967 Brisbane

Woman with sash in sportscar during May Day procession, 1967, Queen Street, Brisbane, Australia. Onlookers stand outside a Queenslander house.

Miss Equal Pay in sportscar during May Day procession 1967 Brisbane

Miss Equal Pay in sportscar during May Day procession, 1967, Queen Street, Brisbane, Australia.

Mounted police during Mayday procession 1965 Brisbane Australia

Mounted police during Mayday procession 1965 Brisbane Australia.

Combined Railways Union float during Mayday procession 1965 Brisbane Australia

Combined Railways Union float during Mayday procession in 1965, Brisbane, Australia. Banners read Stop menacing hand of Vietnam War and 50,000 people used Beenleigh Southport line in 1963.

Meatworkers float during Mayday procession 1965 Brisbane Australia

Meatworkers float during Mayday procession 1965 Brisbane Australia. The Australasian Meat Industry Employees' Union, originally called the Australasian Federated Butchers Employees' Union, was formed in 1905 as an organisation of skilled and unskilled workers in all sectors of the Australian meat processing industry. Faced with a volatile industrial relations environment, AMIEU members developed a reputation for militancy and the AMIEU became one of Australia's most significant unions. In Queensland the union has been involved in many bitter industrial disputes, including the Townsville meatworkers' strike of 1918-19 and the 1946 meat industry strike.

BWIU float with banner End War in Vietnam during Mayday march Brisbane 1965

BWIU with float End war in Vietnam during Mayday procession Brisbane, Australia, May 1965.

Pat Connoly during May Day procession 1971 Brisbane Australia

Marchers including Pat Connoly during the May Day procession 1971 Brisbane, Australia.

Marchers during May Day procession 1971 Brisbane Australia

Marchers during the May Day procession 1971 Brisbane, Australia.

Folk singers during Labour Day march Brisbane 1965

Folk singers during the Labor Day procession, in Brisbane, Australia, May 1965. One person holds a banner relating to the S.S. Binburra

Trucks with banners in Brisbane 1965 during Labor Day procession.

Trucks with banners in Brisbane, Australia, during the Labor Day procession, May 1965.

Participants with Equal pay placard during Labour Day march Brisbane 1965

Participants with Equal pay placard in Brisbane, Australia, during the Labor Day procession, May 1965.

Marchers with banners during Labour Day march Brisbane 1965

Marchers with banners in Brisbane, Australia, during the Labor Day procession, May 1965.