Final answer:
Alpha Phi Alpha was incorporated on January 29, 1911, in the District of Columbia, becoming the formal organization of the first intercollegiate Greek-letter fraternity for African American men.
Step-by-step explanation:
The date on which Alpha Phi Alpha was incorporated in the District of Columbia is January 29, 1911. This historical event marked the formal organization of the first intercollegiate Greek-letter fraternity established for African American Men. Alpha Phi Alpha has since been part of a larger body known as the National Pan-Hellenic Council, which includes notable fraternities and sororities that play a significant role in African American collegiate life. The history of these organizations, including the establishment of others such as Alpha Kappa Alpha, enhances our understanding of the cultural and educational advancements that have been made since their inception.