A. Santamaria's "Movement" within the ALP from 1944, to combat alleged Communist Party infiltration in the trade unions.
[4][2] In response, the Labor party set up "industrial groups" within trade unions to counter the perceived Communist threat.
"The Movement" quickly gained a large influence in the Industrial Groups.
Alleging that the "Groupers" were exercising disproportionate influence within the ALP, the party leader, H. V. Evatt, turned against them following the 1954 federal election, precipitating the 1955 split in the Labor Party.
This resulted in many "Groupers" resigning or being expelled from the ALP, and the disaffiliation of several unions, and the formation of the Australian Labor Party (Anti-Communist), in 1957 becoming the Democratic Labor Party.