Being a MU student, I'm familiar with the Miami Triad. Beta was 1839, Phi Delta in 1849, and Sigma Chi in 1855.
Delta Upsilon, the sixth oldest fraternity, was founded in 1834 at Williams College.
Our manual, The Cornerstone, has a chronological listing of general college fraternities. The first listed is Kappa Alpha Society, Nov 26 1825. Then Sigma Phi, Delta Phi, Alpha Delta Phi, Psi Upsilon, Delta Upsilon, Beta Theta Pi, Chi Psi, Delta Kappa Epsilon, Alpha Sigma Phi, Delta Psi, Zeta Psi, Theta Delta Chi, Phi Gamma Delta, Phi Delta Theta, Phi Kappa Sigma, Phi Kappa Psi, Chi Phi, Sigma Chi, Sigma Alpha Epsilon, Theta Chi, Delta Tau Delta in 1858, and so on...
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Brian Sejas
VP-Public Relations
The Miami Chapter of Delta Upsilon
http://www.mudeltau.org