Frei was not the only victim of these activities certainly; but he was the most prominent.
It's worth mentioning as well that Frei was a true reformist and progressive.
Had he been able to run for re-election in 1970 he would have almost certainly won - thus saving Chile from much of the upheaval they went through with the well-meaning but misguided Allende, and the craven, Nazi-trained Pinochet.
Thanks again for posting these news, Judi.
Chilean President Eduardo Frei (right, smiling) and his Argentine counterpart, Arturo Illia (white hair) during Frei's visit to Buenos Aires in 1965.
Frei and Illia both pursued a moderate reformist course, a strong state role in the economy, and expansionist policies that spurred growth in their countries. Both were, however, rebuffed by business elites and labor alike.
Illia was overthrown in 1966, and died of old age in 1983; Frei left office in 1970, his candidate defeated in the polls, and was later poisoned by the Pinochet regime.