Consider the question. Elvis Presley served in the United States Army between March 1958 and March 1960. At the time of his draft he was the most well-known name in the world of entertainment.

What popular entertainer joined the us army in 1958?
If the answer is 'Elvis Presley'; explain the reasoning:
The relevant sentence in the passage is: Elvis Presley served in the United States Army between March 1958 and March 1960.