During the mid-19th century a revolutionary struggle swept across Ibero-American nations and in the course of several decades monarchical systems of empire that had established themselves across the Americas began to lose their hold on power and a new system of republics were instituted.
Dear Mr Ehret:
Surely you are familiar with the work of Philip Powell.
https://en.wikipedia.org/wiki/Philip_Wayne_Powell
Very interesting book on Spanish America
https://www.google.com/search?q=philip+powell+the+tree+of+hatred
Regards.