After the Peace of Versailles, the Kartellverband's ranks swelled with returning war veterans, resulting in the establishment of numerous additional corporations including the Katholische Österreichere Studentenvereine at Vienna and Graz, Austria.

The Kartellverband faced a triple whammy that eventually resulted in forcible decorporation on July 6, 1938 under the Verbot der Korporationsverbände: Misjudgment of the totalitarian regime of Adolf Hitler, misinformation and deliberate Nazi deception.

In March 1933, the Catholic bishops' resistance to the Nazi power grab weakened, and with it the will of the Studentenvereine to fight; the conclusion of the Reichskonkordat finished both off.

On September 1, 1933 at Frankfurt am Main, the Kartellverband was merged into the Ring katholischer deutscher Burschenschaften, despite objections from within, over the fact that a "color-carrying" and a "non-coleur-wearing" board had been combined; and from without, as the Deutsche Burschenschaft accused the RKDB of name infringement.

Both Kartellverbände were forcibly decorporated on June 20, 1938 in the wake of the Nazi invasion and annexation of Austria (Anschluß Österreiches).

From 1968, the Kartellverband reorganized from the ground up, the primary innovation being the capacities of the member Students' Unions, in certain cases composed of non-Catholic Christians.