MUA members were out in droves over the weekend taking part in May Day marches held in all capital cities and most regional towns.
This year speeches were centred around the need to be prepared for a snap Federal Election and to start organising against the Abbott Government now.
In Adelaide, South Australian Branch Secretary Jamie Newlyn rallied the crowd calling for an end to the Abbott Government's attacks on workers.
"It's no secret Abbott and his cabinet hate us South Australians, they've closed down, or are threatening to close down pretty much every unionised industry there is," Newlyn said.
"Well, comrades, time has come to say enough is enough and we'll do everything in our capacity to ensure that Abbott and his rotten Government won't get a second term.
"See you later One Term Tony."
South Australia also had a May Day dinner at which former MP and honorary MUA member Greg Combet spoke.
The May Day march in South Australia was covered on the ABC and featured the MUA’s banner: Our Coast. Our Fuel. Our Security. Read the story here.
For all of the May Day photos from Adelaide and around the country, click here.