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A veteran of the Brazilian Expeditionary Force during World War II , he served as the Army Chief of Staff during Costa e Silva 's Presidency and then headed the Highest Military Tribunal .
 Brazilian Expeditionary Force, Costa e Silva
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Brazilian Expeditionary Force, Costa e Silva