On 31 July 1990, Port Adelaide surprised the SANFL by making an independent bid to join the AFL. The SANFL was left with little option but to submit its own bid to enter the AFL. In a thirty-minute meeting the SANFL formed the Adelaide Football Club. While Port Adelaide had by far the largest supporter base in South Australia, it could not compete with the SANFL's offer of a composite club and the use of Football Park, and in November 1990, following a legal battle, the AFL announced the Adelaide Football Club had been granted a licence and would enter the competition in 1991.