Never in history the "Partido Comunista Argentino" had any popular support....maybe 20.000 at best. Socialist on the other hand were popular in the 20`s..
For Argentine History you can buy "Breve Historia contemporanea de la Argentina" By Luis Alberto Romero or "Historia de los Argentinos" Part 2. By Florio & Gracia Belsunce.
The one by Romero is used in argentine college's as a introduction to argentine modern history...it goes from 1880 to...
Peru hates Chile....the same goes for Bolivia.....Argentina just doesn't like Chile...there is no hate. Bolivia and Peru lost a lot of territory in the Pacific War. And Argentina and Peru are really close allies....specialy against Chile. I dont see Peru siding whit Chile on this.