The LSSZP was formed clandestinely in 1934 by former members of the left-wing faction of the LSDSP. That year, prime minister
Kārlis Ulmanis had
couped himself, creating a dictatorship and banning all political parties. , who was the chairman of the pre-split LSDSP, led the LSSZP. The LSSZP was closely aligned with the
Communist Party of Latvia. In November 1934, the two parties signed an agreement of unity in action against
fascism. The youth organizations of the two parties merged into the
Workers' Youth League of Latvia in 1936. An anti-fascist
popular front was formed in 1939, with the LSSZP, the Communist Party, and the Workers' Youth League as its main constituents. The first LZZSP congress, held in July 1935, recognized the Bund as an autonomous organization under the same terms as the Bund had previously aligned with the LSDSP. The Bund activists were arrested in November 1936. The party disbanded on 3 July 1940, after the
Soviet Union began
its occupation of Latvia. The Communist Party henceforce became the sole legal party in the
Latvian Soviet Socialist Republic, until the
dissolution of the Soviet Union and restoration of Latvia's independence in 1991. == References ==