Atlanta Journal Constitution finally gets around to talking about SEC expansion. Has a timeline with some history of how the SEC came about. Didn't know about the machinations before the 1933 season when they split from the Southern Conference leaving behind mostly current ACC schools along with a few long time Southern Conference schools.
https://www.ajc.com/sports/georgia-bulld...57TF6T7TU/
"SEC TIMELINE
1894 – First league formed was based in Atlanta and was called Southern Intercollegiate Athletic Association (SIAA). It included seven teams: Alabama, Auburn, Georgia, Georgia Tech, North Carolina, Sewanee and Vanderbilt.
1895 – SIAA expands to 19 teams with additions of Central (later Eastern Kentucky), Clemson, Cumberland, Kentucky, Louisiana (LSU), Mercer and Mississippi A&M (later Miss. State).
1920 – After SIAA had grown to (loosely) include 30 schools, 14 colleges break away to form the Southern Conference. That league included Alabama, Auburn, Clemson, Georgia, Georgia Tech, Kentucky, Maryland, Mississippi, North Carolina, N.C. State, Tennessee, Virginia, Virginia Tech and Washington & Lee.
1922 – The Southern Conference grows to 20 members by adding Florida, LSU, South Carolina, Tulane, Vanderbilt and Virginia Military Institute (VMI).
1923 – Southern Conference adds Sewanee.
1928 – Southern Conference adds Duke to top out at 22 teams.
1932 – In December, the original SEC is formed with 13 teams: Alabama, Auburn, Florida, Georgia, Georgia Tech, Kentucky, LSU, Ole Miss, Mississippi State, Sewanee, Tennessee, Tulane and Vanderbilt.
1940 – Sewanee withdraws from SEC.
1964 – Georgia Tech withdraws from SEC.
1966 – Tulane withdraws from SEC, which now features 10 teams and plays a six-game conference schedule.
1990 – Arkansas (Southwest Conference) and South Carolina (Independent) are voted into league.
1992 – Arkansas and South Carolina begin competition with Eastern and Western Divisions and conference championship game.
2011 – Texas A&M (Big 12) and Missouri (Big 12) are accepted as the SEC’s 13th and 14th members, respectively.
2012 – A&M and Missouri begin SEC play.
2014 – SEC Network is launched.
July 29, 2021 – Oklahoma (Big 12) and Texas (Big 12) are invited to join league. Will enter SEC play in 2025 unless Big 12 grant-of-rights agreement is changed."