In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: One ruler of this country had a secret police force whose name meant "The Ear of Corn," the Mazorkas. In addition to that caudillo named Juan Manuel de Rosas, another ruler of this nation was supported by the Descamisados. This country was the site of the "Dirty War," which was instigated by Jorge Rafael Videla. This nation, along with Brazil and Uruguay, defeated Paraguay in the War of the Triple Alliance. It was once ruled by Juan Peron, whose wife was known as Evita. For 10 points, name this South American country whose leaders reside in Buenos Aires.
A:
History