 The "estreleira" flag was created by communist activists of the UPG (Unión do Povo Galego) in the 1960s, correlating the red star to the stars in the flags of many Socialist countries, in particular Yugoslavia.All the nationalist left-wing political parties of Galicia (BNG, AGE, FPG, CERNA, Nós-Unidade Popular, Causa Galiza, ...) use the Estreleira flag as a party symbol.It's also used by the left-wing nationalist trade unions (such as CIG or CUT).