The country's four small communist parties, the Communist Party of New Zealand (CPNZ), Socialist Unity Party (SUP), Workers Communist League (WCL), and the Socialist Action League (SAL), have tried to influence the Labour Party, the trade unions, and various popular issues, like the anti-Springbok tour protests, Māori biculturalism, and the anti-nuclear movement. During the ANZUS diplomatic crisis 1984 to 1985, which resulted from New Zealand's nuclear ship ban, the pro-Moscow SUP tried to infiltrate anti-nuclear organisations, as part of a strategy of steering New Zealand's foreign policy away from its traditional ally, the United States.