The seven original members of Delta Upsilon were: John McCurdy Robinson, Louis De Vere Holmes, Charles Wright Earnist, William F. Eltzroth, John Randolph Moore, Nehemiah Wade, Matthew Wade.

Competing with five secret societies, the DUs took the lead for most of the remaining years of Old Miami. Delta Upsilon graduated more members than any of the other fraternities.

The closure of Old Miami lasted until New Miami reopened in 1885. Robert White McFarland was again the President when Miami opened after the 12 year hiatus. However, the reopening of Miami did not bring the reestablishment of DU. This didn't happen until 23 years later. The old fraternities didn't take long to reorganize at New Miami. The Betas, Phi Delts, and Dekes returned immediately. Sigma Chi came a little later while the Alpha Delts took until the mid-twentieth century to reform at Miami.

In the fall of 1903, a group of men brought together by similar associations and interests were living in South Dorm. The same forces that motivated the organization of the early Miami fraternities now moved these men to consider forming a fraternal society. While considering a Greek letter name, they called themselves the Midnight Mystics. In 1904 the name Delta Rho was selected. The men of Delta Rho began thinking of going national as soon as their society was formed. They considered four prominent fraternities: Alpha Delta Phi, Alpha Tau Omega, Delta Upsilon, and Phi Kappa Psi. By 1907, Delta Rho decided to petition Delta Upsilon for membership. The Delta Rho's discovered a prejudice against Western fraternities by the East and were denied by the Minnesota Convention because a unanimous decision was needed for membership.

However, after the 1907 failure, one of the charter members of the Miami Chapter in 1868, William Eltzworth of Lebanon, Ohio, at the time a trustee of Miami University, directed the strategy of the Delta Rho campaign. Mr. Eltzworth discovered that the Miami chapter had not disbanded or withdrawn, but instead was just "inactive" due to the suspension of the school in 1873. Eltzworth knew from his experience in the State Senate that reinstatement of an inactive chapter required three fourths of the votes at the convention. It was at the Swathmore Convention of 1908 that Delta Rho was granted a charter of Delta Upsilon. Delta Rho was the only petitioning society of seven at the convention to be granted approval.

It appears that only three events disrupted the success and progress of Miami and the DU Chapter. The first was a sudden and disastrous flood that swept the Miami Valley during the last week of March 1913. The students left to help the seriously hit towns of Hamilton and Dayton; all but two DUs went to help.

A more tragic event was the eruption of World War I in 1914. In anticipation of American participation, a recruiting office was set up by the government at Miami. The recruiting office was the Delta Upsilon house then located on South Campus. The fraternities were compelled to move in order to provide housing for the soldiers in training at Miami. While some fraternities rented clubrooms in town, the DUs took over the Christian Science reading room on Main Street. The banning of clubrooms was considered in order to force the complete concentration on studies and the wartime activity. Needless to say, social life was virtually nonexistent. Although the Miami chapter of Delta Upsilon had given many of its active and alumni brothers to the service of the War, none of them lost their lives. One prominent active, Ransom B. Clark, professor of Greek at Miami and for many years a chapter advisor, died in 1928 as a result of an illness contracted during the service as a pilot in naval aviation.

The 1930's were a time of financial troubles for the whole country including the Miami Chapter of Delta Upsilon. In 1927 the Miami DU Housing Corporation was formed with the idea of building a new house. In February 1931, the realization came true with the opening of the present chapter house on the corner of Vine and Bishop Streets. The original house was built out of Indiana Limestone by the R.S. Crowl Company at a cost of $50,000. The new dining room addition in 1960 raised the total cost to $100,000. With the new house, chapter financial problems began to multiply for the first time in chapter history. Brothers Pultz, Schafer, and Ballinger were drafted to head the Housing Corp. and to help the chapter sort out its difficuties. The financial costs of the new house, coupled with the depression, caused a general lack of money, late payments of bills, and a constant loss of membership. This situation was standard for most of the fraternities on Miami's campus at the time. In 1933, the closing of the house was threatened unless more men could be brought into the house. In January, the chapter president advised the members to invite non-members to reside in the house the following semester.

Toward the end of the '30s, the chapter greatly improved, only to encounter the problems brought on by World War II. With the decline of membership, the fraternity was unable to meet its financial responsibilies. Because of this, the university took over the house and turned it into a girl's dormitory until the end of the war. The few DUs still left on campus rented out the first floor of the home of Professor John W. Ball of the English Department. The members returned to the chapter house in February of 1946. The financial troubles, rationing of meat, sugar, gas, and other products, and other strict regulations were insignificant compared to the Miami Chapter's loss of 12 brothers in WWII.

The 1953-54 chapter won the Outstanding Chapter of the Year Award and by 1955 the entire debt on the house was paid off. In 1960, a mortgage on the house paid for the dining room addition to the back of the house. The late 50s and 60s saw DU was one of the biggest houses on campus with membership reaching and even soaring past the century mark.

In 1987 the Miami Chapter of Delta Upsilon underwent a major reorganization in membership, organization, finances, and alumni and university relations. Strict financial planning, emphasis on high quality of the brothers, active participation in both fraternity and university activities, and positive self confidence were all infused into the chapter. Under the guidance and leadership of alumni J. Paul McNamara '29 and Frank Dodd '49, the Miami Chapter of Delta Upsilon, the 6th oldest fraternity at Miami University, guaranteed its future success with the reorganization and gave the entire brotherhood a new sense of mission. The chapter has now thrived to a unique and strong brotherhood.

Both Miami University and the Miami Chapter of Delta Upsilon are rich in tradition with their histories exemplifying the results of individuals working together for a common goal. The searching for truth and the longing for brotherhood are as ancient as man himself. The finding of truth and the realization of brotherhood are but here for our taking. A unified effort through Miami University and Delta Upsilon Fraternity gives us the opportunity for both truth and brotherhood.