Franklin S. Harris became the university's president in 1921. He was the first BYU president to have a doctoral degree. Harris made several important changes to the school, making it into a true university. At the beginning of his tenure, the school was not an official university. By the end of his term, the school was official to all major organizations. The next president was Howard S. McDonald, who received his doctorate from the University of California. When he first received the position, the Second World War had just ended, and lots of students were coming to BYU. By the end of his stay, the school had grown to 5,440 students. The university did not have the space to handle so many students, so he bought part of an Air Force Base in Ogden, Utah and fixed it to house some of the students. The next president, Ernest L. Wilkinson, also helped the university grow, as the school adopted a faster program to build. Wilkinson was responsible for the building of over eighty structures on the campus, many of which still stand. During his tenure, the student body increased six-fold, making BYU the biggest private school at the time. The quality of the students also increased, leading to higher educational rules at the school. Finally, Wilkinson organized the LDS Church units on campus, with ten large groups and over 100 smaller groups being added during his administration.