Texas A&M decided that with their move to the SEC, they should add some more "titles" to keep up with the Joneses of the SEC.
In this photo from Rant Sports, the Aggies claim that they now have won the 1919 and 1927 NCAA titles and the 1997 and 2010 Big 12 Championship. The reason for claiming the then unheard of titles was that the NCAA never awarded the title to any team.
In 1919, both the Harvard Crimson and Illinois Fighting Illini tied for the championship, but the National Championship Foundation polled its voters and declared that the 1919 season was a four way tie between, Harvard, Illinois, Notre Dame, and the Aggies.
In 1927, Illinois again was named the champion, but Texas A&M, for some reason, claimed the title despite being ranked eleventh in the Dickinson rankings. The reason the Aggies claim this title is that the Sagarin Ratings declared the Aggies the National Champions in the 1980s.
The conference title in 1997 was because the Aggies won the Big 12 South, but they lost the Big 12 Championship that year to Nebraska. In 2010, Texas A&M DIDN'T even make the Big 12 Championship Game. They were part of a three-way tie between actual Big 12 Champion Oklahoma Sooners and the Oklahoma State Cowboys.
Hey, whatever you need to do to strike fear in your new conference foes.