The first classes in Ann Arbor were held in 1841, with six freshmen and a sophomore, taught by two professors. Eleven students graduated in the first commencement in 1845. By 1866, enrollment increased to 1,205 students, many of whom were Civil War veterans. Women were first admitted in 1870, making UM the first major university to do so (and the third college overall, after Oberlin College in 1833 and Lawrence University in 1847). James B. Angell, who served as the university's president from 1871 to 1909, aggressively expanded UM's curriculum to include professional studies in dentistry, architecture, engineering, government, and medicine. UM also became the first American university to use the seminar method of study.