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What rank did Elvis Presley hold in the US Army?

Context:
Elvis Aaron Presley (January 8, 1935 – August 16, 1977), often referred to mononymously as Elvis, was an American singer, actor and sergeant in the United States Army. Dubbed the "King of Rock and Roll", he is regarded as one of the most significant cultural figures of the 20th century. His energized interpretations of songs and sexually provocative performance style, combined with a singularly potent mix of influences across color lines during a transformative era in race relations, led him to both great success and initial controversy.<|im_end|>
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Elvis Presley held the rank of sergeant in the United States Army.<|im_end|>
