This thesis examines how Brazil participated in World War II shoulder to shoulder with the Allies and what this participation brought to the country. During the 1930s, when the relationship between Brazil and Germany was improving yearly, and when it was supposed Brazil would support Germany in case of war, Brazilian leaders could drive the country to support the Allies cause, mainly the United States of America, allowing this country to set aerial bases in Brazilian North East region, in order to facilitate a connection with North of Africa. Moreover, the option in sending a Brazilian Expeditionary Force (BEF) to fight for the Allied in Italy was one of the most important decisions in Brazilian history. It was the first time that Brazil would take part in a war away from South America. The BEF did its best to well represent Brazil, overcoming several difficulties since its preparation and eventually, showing the Brazilian soldiers could fight as equal as the best soldiers in that war. Brazilian participation is almost unknown by countries away from South America, even here in United States; however, this participation was responsible for several transformations in Brazilian's nation powers. After the war, Brazil became the most powerful and wealthy country in South America. And due to this participation, the country became a global actor. It could be demonstrated for the Brazilian support to the creation of the United Nations. The Brazilian participation in World War II, doubtless, was the engine that transforms the country economically, politically, and militarily.

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