hiː wʌzɐ fˈaʊndɚ mˈɛmbɚɹ ʌvðə jˌuːˌɛnˈɛs ɪn nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi sˈɛvən ænd bɪkˌeɪm ɐn ˈɔːɹɡɐnˌaɪzɚɹ ɪn mˌɪtʃoʊkˈɑːn, bᵻfˌoːɹ tˈeɪkɪŋ fˈʊl tʃˈɑːɹdʒ ʌvðə mˈuːvmənt ɪn nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi wɛn ɪt wʌz æɾ ɪts pˈiːk wɪð fˈaɪvhˈʌndɹɪd,zˈiəɹoʊzˈiəɹoʊ zˈiəɹoʊ mˈɛmbɚz.
He was a founder member of the UNS in 1937 and became an organiser in Michoacán, before taking full charge of the movement in 1940 when it was at its peak with 500,000 members.