What were the achievements of Bolívar, San Martín, and Dom Pedro?

Bolivar has helped a number of modern South American states become independent from the Spanish rule. Eventually, he became the Venezuelan President.

San Martin was a general, who participated in the Spanish-American war of independence, and was the first president of Peru (under the name of "Protector of Peru").

Dom Pedro was a Portuguese King (which at the time included Brazil as well), who declared independence of Brazil, and reigned over Brazil only after that.

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