I'm looking for a Latin-American country. Brazil and Chile would have been my first and second choices before I started researching, but now I'm open to input. The country in question needs to have had a problem with civil war/violence/strife that would have made it particularly hard for the common/lower classes to get by, during...say...some point between 1850 and 1900. Wikipedia is awesome for History in an abstract sense, discussing the top Generals and politicians and strategic maneuvers, but it is somewhat lacking in identifying the effects on the common citizens. It's always fun for trivia's sake to know that General Whoever overthrew President Blah in the year X, but how bad would it have been to be caught living there during that?
Ideally, I'm looking for a 1850-or-so setting in which it would not be unrealistic for a character to claim her family was poor from living in a war-torn area, tried to more or kess keep out of things, but got killed by random fighters anyway (probably for being accidental obstacles, like if the army just wanted their land or something.) She became immortal since then and the story is modern, so assume radical difference between then and now (both in time and in tone) isn't an issue. Bonus points if a setting can be found in which "Flores" is an acceptable last name, but if that's totally irreconcilable, I can probably come up with something else.