Question: The club song of the Adelaide Football Club is to the tune of the oldest official song in what?

Context paragraphs:
Bruce Abernethy: Bruce Abernethy (born 10 May 1962) is a former professional Australian rules footballer who played for the North Melbourne Football Club and Adelaide Football Club in the Victorian/Australian Football League (VFL/AFL), and the Port Adelaide Football Club in the South Australian National Football League (SANFL) and is a media personality.

Adelaide Football Club: The Adelaide Football Club, nicknamed the Crows, is a professional Australian rules football club that competes in the Australian Football League (AFL).  The club is based in Adelaide, South Australia, playing its home matches at Adelaide Oval.  The club has its training and administration base at Football Park in West Lakes, where it previously played home matches between 1991 and 2013.  The club song is "The Pride of South Australia", to the tune of the Marines' Hymn.

West Perth Football Club: The West Perth Football Club, nicknamed the Falcons, is an Australian rules football club located in Joondalup, Western Australia.  West Perth competes in the West Australian Football League (WAFL) and is the oldest existing Australian rules football club in Western Australia.  Originally located at Leederville Oval, the team was relocated in 1994 to Arena Joondalup, a sports complex in the northern suburbs of Perth.  The team's club song is "It's a Grand Old Flag" and its traditional rivals are East Perth.

Marines' Hymn: The "Marines' Hymn" is the official hymn of the United States Marine Corps, introduced by the first Director of USMC Band, Francesco Maria Scala.  It is the oldest official song in the United States Armed Forces.  The "Marines' Hymn" is typically sung at the position of attention as a gesture of respect.  However, the third verse is also used as a toast during formal events, such as the birthday ball and other ceremonies.  Western Illinois University uses the hymn prior to all football games.  They are the only non-military academy allowed to use the hymn.  The university has had permission to use the official nickname, mascot, and hymn of the Corps since 1927.

Andrew Jarman: Andrew Newton Jarman (born 14 January 1966) is a former professional Australian rules footballer who played for the Adelaide Football Club in the Australian Football League (AFL), and the North Adelaide Football Club and Norwood Football Club in the South Australian National Football League (SANFL).  He is the older brother of Adelaide legend Darren Jarman and has won the Magarey Medal twice.

Grantley Fielke: Grantley Craig Fielke (born 18 March 1962 in Loxton, South Australia) is a former Australian rules footballer who played for West Adelaide Football Club in the South Australian National Football League (SANFL), and the Collingwood Football Club and Adelaide Football Club in the Victorian/Australian Football League (VFL/AFL).

Aquinas Old Collegians Football Club: Aquinas Old Collegians Football Club, nicknamed the Bloods, is an amateur Australian rules football club in Ringwood, Victoria, playing in the Victorian Amateur Football Association (VAFA).  Previously called Aquinas Old Boys Football Club when it was founded in 1981, the club plays at Aquinas College.  The club song is "We're a team of Champions", to the tune of "Join in the Chorus" .

Port Adelaide Football Club: The Port Adelaide Football Club is a professional Australian rules football club based in Alberton, Port Adelaide, South Australia.  The club's senior team plays in the Australian Football League (AFL) under the nickname Power, whilst its reserves and development teams compete in the South Australian National Football League (SANFL) under the nickname Magpies.  Port Adelaide is the oldest professional sporting club in South Australia and the fifth-oldest club in the AFL.  Since the club's first game on 24 May 1870, the club has won 36 South Australian league premierships, including six in a row.  The club also won the Champions of Australia competition on a record four occasions.  In 1997, the club joined the Australian Football League as the only pre-existing non-Victorian club—and subsequently added the 2004 AFL premiership to its achievements.

Adelaide Football Club (SAFA): The Adelaide Football Club was an Australian rules football club, based in Adelaide, that played interclub football between 1870 to 1872 and 1875 to 1876, and then played in the South Australian Football Association (SAFA) from 1877–81 and 1885–93, winning the interclub premiership in 1870-1871 and the SAFA premiership in 1886.  The club bears no relation to the present Adelaide Football Club playing in the Australian Football League.

Ashley Fernee: Ashley Fernee (born 24 June 1977) is a former Australian rules footballer who played in the Australian Football League (AFL).  He was selected for the Adelaide Football Club in the 1995 draft, having previously played with the Calder Cannons.  Fernee only played two games for the Adelaide Football Club in 1996, debuting against Fitzroy Football Club in round 17.  In spite of those two games, he was not selected to play in 1997, and in 1998 things were not looking promising, with Michelangelo Rucci stating that the "wait will go on unless a long injury list strikes again".  Fernee did not play in 1998, and he was delisted by the Adelaide Football Club in October of that year.  He played for the SANFL team, South Adelaide Football Club, in 1999, and nominated for the AFL draft at the end of the season.  Unsuccessful, Fernee left Adelaide to return to Victoria, where he played for the East Keilor Football Club.

Supporting paragraphs: Adelaide Football Club Marines' Hymn
Answer: the United States Armed Forces