Why was Brazil involved in World War 2?

Answer 1

Essentially, Brazil tried to maintain a neutral stance during the first years of the War. Given the strong Immigration from German, Japanese and Italian nationals to Brazil during late 1800's in some areas the population was supportive to the Axis.

However, after the sinking of several Brazilian merchant ships by German submarines local pressure increased substantially and the government reviewed its position declaring war on Germany and its allies in January 1942.

From mid 1944 onwards Brazil had troops and a flight squadron operating in European soil, supporting the American army in their operations in Italy.

More info on the following links:

http://www.tau.ac.il/eial/VI_2/mccann.htm

http://history.sandiego.edu/gen/st/~johnw/index.HTML

Answer 2

Sold oil to Germany and USA