But military success of Julio Argentino Roca in the Conquest of the Desert , and Roca 's evident presidential ambition convinced him to give up the nomination .
Simultaneously , several groups named him an official candidate for the presidency of the nation .
Military success of Julio Argentino Roca in the Conquest of the Desert , and Roca 's evident presidential ambition convinced him to give up the nomination .
Simultaneously , several groups named him an official candidate for the presidency of the nation .