 Complete the following phrase:  The Peru national team enjoyed its most successful periods thanks to footballing generations from the 1930s and the 1970s. The 1930s generation led Peru at the inaugural FIFA World Cup in 1930 and won the 1938 Bolivarian Games and the 1939 Copa América, with goalkeeper Juan Valdivieso and forwards Teodoro Fernández and Alejandro Villanueva playing important roles. The 1970s generation qualified Peru for three World Cups and won the 