Doug and Rusty both enlisted in the United States Army. They devoted their attention to the military until their discharge three years later. "Louisiana Man" and solo career After fulfilling their military obligation, the two brothers recorded "Louisiana Man", an autobiographical song that Doug had written while in the Army. The song not only sold millions of copies but over the years has come to be considered a standard of modern Cajun music. The song was eventually covered by more than 800 artists. There were three albums released by the duo on Hickory Records, only one being released before they split up. The first was Rusty and Doug Sing Louisiana Man (LPM 103) in 1961. Kershaw (Genus Cambarus) (LPS 163) was released in 1972 and was a double LP. Louisiana Man (HR 4506) was the final Hickory album, released in 1974. By 1964, the brothers had elected to go their separate ways. It took another three years before Kershaw signed a songwriters' contract with BMI, in 1967. In June 1969, Kershaw made his first network television appearance on the debut of the Johnny Cash Show. After watching Kershaw's Johnny Cash Show performance as an eight-year-old boy, Mark O'Connor became inspired to learn to play the fiddle. He capped the year with a week-long engagement at the New York City's Fillmore East as opening act for Eric Clapton's Derek and the Dominos. While it seemed to many rock and pop fans that Kershaw had appeared out of nowhere, he had already sold more than 18 million copies of the records he had made in the early '60s with his brother, Rusty. "Louisiana Man" had been a Top 10 country hit in 1961 and its follow-up, "Diggy Liggy Lo", had done almost as well. His performance in front of a national audience led to Warner Bros. Records signing him to a long-term contract. In July 1969, he performed at the Newport folk festival along with Joni Mitchell, Arlo Guthrie, Ramblin Jack Elliott, Big Mama Thornton, and Mimi Fariña, among others. Newcomers that year were Don McLean, James Taylor, and Jerry Jeff Walker. In November 1969, "Louisiana Man" was broadcast back to earth by the crew of the Apollo 12 moon mission. Beyond the southern venues, Kershaw became widely known in mainstream America as he played at major urban concert halls. In 1970, Kershaw contributed a violin part to Arlo Guthrie's record single