[1] Trade unions close to RILU had formed a Comité Pro Confederación Sindical in April 1928.
Prior to the official founding of CSLA, the committee organized a trade unionist conference against the emerging threat of war in the Chaco region on February 25, 1928.
At the founding conference 10 national unions, 2 regional federations and 3 local federations participated, representing Mexico, Colombia, Cuba, Uruguay, Bolivia, Ecuador, Peru, Guatemala, Venezuela, El Salvador, Panama, Brazil, Costa Rica, Argentina and Paraguay.
[1] The CSLA took a strong revolutionary and anti-imperialist line, denouncing the Pan-American Federation of Labor and calling for international proletarian revolution.
[2] The executive committee of CSLA decided to disband the organisation in 1936, in order to enable the creation of a broader anti-fascist and anti-imperialist unity in the Latin American workers movement.