As secretary of labor under the military regime that came to power in 1943, Colonel Juan Domingo Perón courted the unions and working class and by doing so established a power base that threatened the government.
Hence during the 1960s and early 1970s, Peronism was split between a wing associated with the union movement on the one hand, and on the other hand a more radical wing inspired by third worldism and Guevarism and led by the Peronist Youth (Juventud Peronista).